May the force be with you? Much to learn you still have, padawan. In our universe it would be more appropriate to say, “May the four forces be with you.”
There are four fundamental forces that bind our universe and its building blocks together. Two of them are easy to spot — gravity keeps your feet on the ground while electromagnetism keeps your devices running. The other two are a little harder to see directly in everyday life, but without them, our universe would look a lot different!
Let’s explore these forces in a little more detail.
If you jump up, gravity brings you back down to Earth. It also keeps the solar system together … and our galaxy, and our local group of galaxies and our supercluster of galaxies.
Gravity pulls everything together. Everything, from the bright centers of the universe to the planets farthest from them. In fact, you (yes, you!) even exert a gravitational force on a galaxy far, far away. A tiny gravitational force, but a force nonetheless.
Credit: NASA and the Advanced Visualization Laboratory at the National Center for Supercomputing and B. O'Shea, M. Norman
Despite its well-known reputation, gravity is actually the weakest of the four forces. Its strength increases with the mass of the two objects involved. And its range is infinite, but the strength drops off as the square of the distance. If you and a friend measured your gravitational tug on each other and then doubled the distance between you, your new gravitational attraction would just be a quarter of what it was. So, you have to be really close together, or really big, or both, to exert a lot of gravity.
Even so, because its range is infinite, gravity is responsible for the formation of the largest structures in our universe! Planetary systems, galaxies and clusters of galaxies all formed because gravity brought them together.
Gravity truly surrounds us and binds us together.
You know that shock you get on a dry day after shuffling across the carpet? The electricity that powers your television? The light that illuminates your room on a dark night? Those are all the work of electromagnetism. As the name implies, electromagnetism is the force that includes both electricity and magnetism.
Electromagnetism keeps electrons orbiting the nucleus at the center of atoms and allows chemical compounds to form (you know, the stuff that makes up us and everything around us). Electromagnetic waves are also known as light. Once started, an electromagnetic wave will travel at the speed of light until it interacts with something (like your eye) — so it will be there to light up the dark places.
Like gravity, electromagnetism works at infinite distances. And, also like gravity, the electromagnetic force between two objects falls as the square of their distance. However, unlike gravity, electromagnetism doesn't just attract. Whether it attracts or repels depends on the electric charge of the objects involved. Two negative charges or two positive charges repel each other; one of each, and they attract each other. Plus. Minus. A balance.
This is what happens with common household magnets. If you hold them with the same “poles” together, they resist each other. On the other hand, if you hold a magnet with opposite poles together — snap! — they’ll attract each other.
Electromagnetism might just explain the relationship between a certain scruffy-looking nerf-herder and a princess.
Credit: Lawrence Livermore National Laboratory
The strong force is where things get really small. So small, that you can’t see it at work directly. But don’t let your eyes deceive you. Despite acting only on short distances, the strong force holds together the building blocks of the atoms, which are, in turn, the building blocks of everything we see around us.
Like gravity, the strong force always attracts, but that’s really where their similarities end. As the name implies, the force is strong with the strong force. It is the strongest of the four forces. It brings together protons and neutrons to form the nucleus of atoms — it has to be stronger than electromagnetism to do it, since all those protons are positively charged. But not only that, the strong force holds together the quarks — even tinier particles — to form those very protons and neutrons.
However, the strong force only works on very, very, very small distances. How small? About the scale of a medium-sized atom’s nucleus. For those of you who like the numbers, that’s about 10-15 meters, or 0.000000000000001 meters. That’s about a hundred billion times smaller than the width of a human hair! Whew.
Its tiny scale is why you don’t directly see the strong force in your day-to-day life. Judge a force by its physical size, do you?
If you thought it was hard to see the strong force, the weak force works on even smaller scales — 1,000 times smaller. But it, too, is extremely important for life as we know it. In fact, the weak force plays a key role in keeping our Sun shining.
But what does the weak force do? Well … that requires getting a little into the weeds of particle physics. Here goes nothing! We mentioned quarks earlier — these are tiny particles that, among other things, make up protons and neutrons. There are six types of quarks, but the two that make up protons and neutrons are called up and down quarks. The weak force changes one quark type into another. This causes neutrons to decay into protons (or the other way around) while releasing electrons and ghostly particles called neutrinos.
So for example, the weak force can turn a down quark in a neutron into an up quark, which will turn that neutron into a proton. If that neutron is in an atom’s nucleus, the electric charge of the nucleus changes. That tiny change turns the atom into a different element! Such reactions are happening all the time in our Sun, giving it the energy to shine.
The weak force might just help to keep you in the (sun)light.
All four of these forces run strong in the universe. They flow between all things and keep our universe in balance. Without them, we’d be doomed. But these forces will be with you. Always.
You can learn more about gravity from NASA’s Space Place and follow NASAUniverse on Twitter or Facebook to learn about some of the cool cosmic objects we study with light.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
@saraxmix: What is it that makes you go back up there once you're home?
Every year at this time, we take a moment to reflect as the NASA Family on the very broad shoulders on which we stand: the shoulders of those women and men of NASA who gave their lives so that we could continue to reach for new heights for the benefit of all humankind.
To honor our fallen heroes and friends, NASA Administrator Charles Bolden and Deputy Administrator Dava Newman spoke at a wreath-laying ceremony at Arlington National Cemetery, at the grave sites of the fallen crew.
The crew aboard the International Space Station also payed tribute with a moment of silence.
President Barack Obama recognized the day with the release of an official statement that honors the legacy of the heroes who lost their lives helping America touch the stars.
To view the President’s full statement, visit HERE.
Visit our Day of Remembrance page to learn about the crews & missions we've lost: http://www.nasa.gov/externalflash/DOR2016/index.html
Thank you for keeping our fallen colleagues in your hearts and for honoring their legacy.
June 1 marks the start of hurricane season in the Atlantic Ocean. Last year’s hurricane season saw a record-setting 30 named storms. Twelve made landfall in the United States, also a record. From space, NASA has unique views of hurricanes and works with other government agencies -- like the National Oceanographic and Atmospheric Administration (NOAA) -- to better understand individual storms and entire hurricane seasons.
Here, five ways NASA is changing hurricane science:
1. We can see storms from space
From space, we can see so much more than what’s visible to the naked eye. Among our missions, NASA and NOAA have joint satellite missions monitoring storms in natural color -- basically, what our eyes see -- as well as in other wavelengths of light, which can help identify features our eyes can’t on their own. For instance, images taken in infrared can show the temperatures of clouds, as well as allow us to track the movement of storms at night.
2. We can see inside hurricanes in 3D
If you’ve ever had a CT scan or X-ray done, you know how important 3D imagery can be to understanding what’s happening on the inside. The same concept applies to hurricanes. Our Global Precipitation Measurement mission’s radar and microwave instruments can see through storm clouds to see the precipitation structure of the storm and measure how much total rain is falling as a result of the storm. This information helps scientists understand how the storm may change over time and understand the risk of severe flooding.
We can even virtually fly through hurricanes!
3. We’re looking at how climate change affects hurricane behavior
Climate change is likely causing storms to behave differently. One change is in how storms intensify: More storms are increasing in strength quickly, a process called rapid intensification, where hurricane wind speeds increase by 35 mph (or more) in just 24 hours.
In 2020, a record-tying nine storms rapidly intensified. These quick changes in storm strength can leave communities in their path without time to properly prepare.
Researchers developed a machine learning model that could more accurately detect rapidly intensifying storms.
It’s not just about how quickly hurricanes gain strength. We’re also looking at how climate change may be causing storms to move more slowly, which makes them more destructive. These “stalled” storms can slow to just a few miles an hour, dumping rain and damaging winds on one location at a time. Hurricane Dorian, for example, stalled over Grand Bahama and left catastrophic damage in its wake. Hurricanes Harvey and Florence experienced stalling as well, both causing major flooding.
4. We can monitor damage done by hurricanes
Hurricane Maria reshaped Puerto Rico’s forests. The storm destroyed so many large trees that the overall height of the island’s forests was shortened by one-third. Measurements from the ground, the air, and space gave researchers insights into which trees were more susceptible to wind damage.
Months after Hurricane Maria, parts of Puerto Rico still didn’t have power. Using satellite data, researchers mapped which neighborhoods were still dark and analyzed demographics and physical attributes of the areas with the longest wait for power.
5. We help communities prepare for storms and respond to their aftermath
The data we collect is available for free to the public. We also partner with other federal agencies, like the Federal Emergency Management Agency (FEMA), and regional and local governments to help prepare for and understand the impacts of disasters like hurricanes.
In 2020, our Disasters Program provided data to groups in Alabama, Louisiana, and Central America to identify regions significantly affected by hurricanes. This helps identify vulnerable communities and make informed decisions about where to send resources.
The 2021 Atlantic hurricane season starts today, June 1. Our colleagues at NOAA are predicting another active season, with an above average number of named storms. At NASA, we’re developing new technology to study how storms form and behave, including ways to understand Earth as a system. Working together with our partners at NOAA, FEMA and elsewhere, we’re ready to help communities weather another year of storms.
Bonus: We see storms on other planets, too!
Earth isn’t the only planet with storms. From dust storms on Mars to rains made of glass, we study storms and severe weather on planets in our solar system and beyond. Even the Sun has storms. Jupiter’s Great Red Spot, for instance, is a hurricane-like storm larger than the entire Earth.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
One year ago, on Sept. 15, 2017, NASA’s Cassini spacecraft ended its epic exploration of Saturn with a planned dive into the planet’s atmosphere--sending back new science to the last second. The spacecraft is gone, but the science continues. Here are 10 reasons why Cassini mattered...
Cassini and ESA (European Space Agency)’s Huygens probe expanded our understanding of the kinds of worlds where life might exist.
At Saturn’s largest moon, Titan, Cassini and Huygens showed us one of the most Earth-like worlds we’ve ever encountered, with weather, climate and geology that provide new ways to understand our home planet.
Cassini gave us a portal to see the physical processes that likely shaped the development of our solar system, as well as planetary systems around other stars.
The length of Cassini’s mission enabled us to observe weather and seasonal changes over nearly half of a Saturn year, improving our understanding of similar processes at Earth, and potentially those at planets around other stars.
Cassini revealed Saturn’s moons to be unique worlds with their own stories to tell.
Cassini showed us the complexity of Saturn’s rings and the dramatic processes operating within them.
Some of Cassini’s best discoveries were serendipitous. What Cassini found at Saturn prompted scientists to rethink their understanding of the solar system.
Cassini represented a staggering achievement of human and technical complexity, finding innovative ways to use the spacecraft and its instruments, and paving the way for future missions to explore our solar system.
Cassini revealed the beauty of Saturn, its rings and moons, inspiring our sense of wonder and enriching our sense of place in the cosmos.
The data returned by Cassini during its 13 years at Saturn will continue to be studied for decades, and many new discoveries are undoubtedly waiting to be revealed. To keep pace with what’s to come, we’ve created a new home for the mission--and its spectacular images--at https://solarsystem.nasa.gov/cassini.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
Our ongoing exploration of the solar system has yielded more than a few magical images. Why not keep some of them close by to inspire your own explorations? This week, we offer 10 planetary photos suitable for wallpapers on your desktop or phone. Find many more in our galleries. These images were the result of audacious expeditions into deep space; as author Edward Abbey said, "May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view."
This self-portrait of NASA's Curiosity Mars rover shows the robotic geologist in the "Murray Buttes" area on lower Mount Sharp. Key features on the skyline of this panorama are the dark mesa called "M12" to the left of the rover's mast and pale, upper Mount Sharp to the right of the mast. The top of M12 stands about 23 feet (7 meters) above the base of the sloping piles of rocks just behind Curiosity. The scene combines approximately 60 images taken by the Mars Hand Lens Imager, or MAHLI, camera at the end of the rover's robotic arm. Most of the component images were taken on September 17, 2016.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
NASA's New Horizons spacecraft captured this high-resolution, enhanced color view of Pluto on July 14, 2015. The image combines blue, red and infrared images taken by the Ralph/Multispectral Visual Imaging Camera (MVIC). Pluto's surface sports a remarkable range of subtle colors, enhanced in this view to a rainbow of pale blues, yellows, oranges, and deep reds. Many landforms have their own distinct colors, telling a complex geological and climatological story that scientists have only just begun to decode.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
On July 19, 2013, in an event celebrated the world over, our Cassini spacecraft slipped into Saturn's shadow and turned to image the planet, seven of its moons, its inner rings — and, in the background, our home planet, Earth. This mosaic is special as it marks the third time our home planet was imaged from the outer solar system; the second time it was imaged by Cassini from Saturn's orbit, the first time ever that inhabitants of Earth were made aware in advance that their photo would be taken from such a great distance.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
Before leaving the Pluto system forever, New Horizons turned back to see Pluto backlit by the sun. The small world's haze layer shows its blue color in this picture. The high-altitude haze is thought to be similar in nature to that seen at Saturn's moon Titan. The source of both hazes likely involves sunlight-initiated chemical reactions of nitrogen and methane, leading to relatively small, soot-like particles called tholins. This image was generated by combining information from blue, red and near-infrared images to closely replicate the color a human eye would perceive.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
A huge storm churning through the atmosphere in Saturn's northern hemisphere overtakes itself as it encircles the planet in this true-color view from Cassini. This picture, captured on February 25, 2011, was taken about 12 weeks after the storm began, and the clouds by this time had formed a tail that wrapped around the planet. The storm is a prodigious source of radio noise, which comes from lightning deep within the planet's atmosphere.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
Another massive storm, this time on Jupiter, as seen in this dramatic close-up by Voyager 1 in 1979. The Great Red Spot is much larger than the entire Earth.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
Jupiter is still just as stormy today, as seen in this recent view from NASA's Juno spacecraft, when it soared directly over Jupiter's south pole on February 2, 2017, from an altitude of about 62,800 miles (101,000 kilometers) above the cloud tops. From this unique vantage point we see the terminator (where day meets night) cutting across the Jovian south polar region's restless, marbled atmosphere with the south pole itself approximately in the center of that border. This image was processed by citizen scientist John Landino. This enhanced color version highlights the bright high clouds and numerous meandering oval storms.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
X-rays stream off the sun in this image showing observations from by our Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by our Solar Dynamics Observatory (SDO). The NuSTAR data, seen in green and blue, reveal solar high-energy emission. The high-energy X-rays come from gas heated to above 3 million degrees. The red channel represents ultraviolet light captured by SDO, and shows the presence of lower-temperature material in the solar atmosphere at 1 million degrees.
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
This image from NASA's Mars Reconnaissance Orbiter shows Victoria crater, near the equator of Mars. The crater is approximately half a mile (800 meters) in diameter. It has a distinctive scalloped shape to its rim, caused by erosion and downhill movement of crater wall material. Since January 2004, the Mars Exploration Rover Opportunity has been operating in the region where Victoria crater is found. Five days before this image was taken in October 2006, Opportunity arrived at the rim of the crater after a drive of more than over 5 miles (9 kilometers). The rover can be seen in this image, as a dot at roughly the "ten o'clock" position along the rim of the crater. (You can zoom in on the full-resolution version here.)
800 x 600
1024 x 768
1280 x 1024
1600 x 1200
1280 x 800
1440 x 900
1920 x 1200
Last, but far from least, is this remarkable new view of our home planet. Last week, we released new global maps of Earth at night, providing the clearest yet composite view of the patterns of human settlement across our planet. This composite image, one of three new full-hemisphere views, provides a view of the Americas at night from the NASA-NOAA Suomi-NPP satellite. The clouds and sun glint — added here for aesthetic effect — are derived from MODIS instrument land surface and cloud cover products.
Full Earth at night map
Americas at night
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
How are decisions made about what experiments are sent into space? Are there certain kinds of experiments that NASA wants to conduct every time cargo is launched to the ISS, or are there occasionally experiments that are duplicated for more observation and data collection?
Exactly sixty years ago today, we opened our doors for the first time. And since then, we have opened up a universe of discovery and innovation.
There are so many achievements to celebrate from the past six decades, there’s no way we can go through all of them. If you want to dive deeper into our history of exploration, check out NASA: 60 Years and Counting.
In the meantime, take a moonwalk down memory lane with us while we remember a few of our most important accomplishments from the past sixty years!
In 1958, President Eisenhower signed the National Aeronautics and Space Act, which effectively created our agency. We officially opened for business on October 1.
To learn more about the start of our space program, watch our video: How It All Began.
Alongside the U.S. Air Force, we implemented the X-15 hypersonic aircraft during the 1950s and 1960s to improve aircraft and spacecraft.
The X-15 is capable of speeds exceeding Mach 6 (4,500 mph) at altitudes of 67 miles, reaching the very edge of space.
Dubbed the “finest and most productive research aircraft ever seen,” the X-15 was officially retired on October 24, 1968. The information collected by the X-15 contributed to the development of the Mercury, Gemini, Apollo, and Space Shuttle programs.
To learn more about how we have revolutionized aeronautics, watch our Leading Edge of Flight video.
On July 20, 1969, Neil Armstrong and Buzz Aldrin became the first humans to walk on the moon. The crew of Apollo 11 had the distinction of completing the first return of soil and rock samples from beyond Earth.
Astronaut Gene Cernan, during Apollo 17, was the last person to have walked on the surface of the moon. (For now!)
The Lunar Roving Vehicle was a battery-powered rover that the astronauts used during the last three Apollo missions.
To learn more about other types of technology that we have either invented or improved, watch our video: Trailblazing Technology.
Our long-term Earth-observing satellite program began on July 23, 1972 with the launch of Landsat 1, the first in a long series (Landsat 9 is expected to launch in 2020!) We work directly with the U.S. Geological Survey to use Landsat to monitor and manage resources such as food, water, and forests.
Landsat data is one of many tools that help us observe in immense detail how our planet is changing. From algae blooms to melting glaciers to hurricane flooding, Landsat is there to help us understand our own planet better.
Off the Earth, for the Earth.
To learn more about how we contribute to the Earth sciences, watch our video: Home, Sweet Home.
Space Transportation System-1, or STS-1, was the first orbital spaceflight of our Space Shuttle program.
The first orbiter, Columbia, launched on April 12, 1981. Over the next thirty years, Challenger, Discovery, Atlantis, and Endeavour would be added to the space shuttle fleet.
Together, they flew 135 missions and carried 355 people into space using the first reusable spacecraft.
On January 16, 1978, we selected a class of 35 new astronauts--including the first women and African-American astronauts.
And on June 18, 1983, Sally Ride became the first American woman to enter space on board Challenger for STS-7.
To learn more about our astronauts, then and now, watch our Humans in Space video.
Everybody loves Hubble! The Hubble Space Telescope was launched into orbit on April 24, 1990, and has been blowing our minds ever since.
Hubble has not only captured stunning views of our distant stars and galaxies, but has also been there for once-in-a-lifetime cosmic events. For example, on January 6, 2010, Hubble captured what appeared to be a head-on collision between two asteroids--something no one has ever seen before.
In this image, Hubble captures the Carina Nebula illuminating a three-light-year tall pillar of gas and dust.
To learn more about how we have contributed to our understanding of the solar system and beyond, watch our video: What’s Out There?
Cooperation to build the International Space Station began in 1993 between the United States, Russia, Japan, and Canada.
The dream was fully realized on November 2, 2000, when Expedition 1 crew members boarded the station, signifying humanity’s permanent presence in space!
Although the orbiting lab was only a couple of modules then, it has grown tremendously since then!
To learn more about what’s happening on the orbiting outpost today, visit the Space Station page.
We have satellites in the sky, humans in orbit, and rovers on Mars. Very soon, we will be returning humankind to the Moon, and using it as a platform to travel to Mars and beyond.
And most importantly, we bring the universe to you.
What are your favorite NASA moments? We were only able to share a few of ours here, but if you want to learn about more important NASA milestones, check out 60 Moments in NASA History or our video, 60 Years in 60 Seconds.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
The United Launch Alliance’s Atlas V rocket carrying the Orbital ATK Cygnus module rolls to Cape Canaveral Air Force Station's Launch Pad 41 in this time-lapse video. The rollout is in preparation for the Orbital ATK CRS-7 mission to deliver supplies to the International Space Station.
Launch is currently scheduled for 11:11 a.m. EDT, watch live coverage: http://www.nasa.gov/live
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
Parachutes are a key part of the landing system for many of our spacecraft, but before we send them into orbit — or beyond — we have to make sure that they’re going to work as designed. One important component of testing is a video that captures every millisecond as the chute opens, to see if it’s working and if not, what went wrong.
Integrated Design Tools built a camera for us that could do just that: rugged and compact, it can film up to 1,000 frames per second and back up all that data almost as fast. Now that same technology is being used to record crash tests, helping ensure that we’re all safer on the roads.
We often use laser-imaging technology, or lidar, on missions in outer space. Thanks to lidar, snow was discovered on Mars, and the technology will soon help us collect a sample from an asteroid to bring home to Earth.
To do all that, we’ve helped make smaller, more rugged, and more powerful lidar devices, which have proven useful here on Earth in a lot of ways, including for archaeologists. Lidar scans can strip away the trees and bushes to show the bare earth—offering clues to help find bones, fossils, and human artifacts hidden beneath the surface.
A screw is a screw, right? Or is it?
When we were building the Space Shuttle, we needed a screw that wouldn’t loosen during the intense vibrations of launch. An advanced screw threading called Spiralock, invented by the Holmes Tool Company and extensively tested at Goddard Space Flight Center, was the answer.
Now it’s being used in golf clubs, too. Cobra Puma Golf built a new driver with a spaceport door (designed to model the International Space Station observatory) that allows the final weight to be precisely calibrated by inserting a tungsten weight before the door is screwed on.
And to ensure that spaceport door doesn’t pop off, Cobra Puma Golf turned to the high-tech threading that had served the Space Shuttle so well.
Neurosurgery tools need to be as precise as possible.
One important tool, bipolar forceps, uses electricity to cut and cauterize tissue. But electricity produces waste heat, and to avoid singeing healthy brain tissue, Thermacore Inc. used a technology we’ve been relying on since the early days of spaceflight: heat pipes. The company, which built its expertise in part through work it has done for us over more than 30 years, created a mini heat pipe for bipolar forceps.
The result means surgery is done more quickly, precisely — and most importantly, more safely.
The Ares 1 rocket, originally designed to launch crewed missions to the moon and ultimately Mars, had a dangerous vibration problem, and the usual solutions were way too bulky to work on a launch vehicle.
Our engineers came up with a brand new technology that used the liquid fuel already in the rocket to get rid of the vibrations. And, it turns out, it works just as well with any liquid—and not just on rockets.
An adapted version is already installed on a building in Brooklyn and could soon be keeping skyscrapers and bridges from being destroyed during earthquakes.
When excess fertilizer washes away into ground water it’s called nutrient runoff, and it’s a big problem for the environment. It’s also a problem for farmers, who are paying for fertilizer the plant never uses.
Ed Rosenthal, founder of a fertilizer company called Florikan, had an idea to fix both problems at once: coating the fertilizer in special polymers to control how quickly the nutrient dissolves in water, so the plant gets just the right amount at just the right time.
Our researchers helped him perfect the formula, and the award-winning fertilizer is now used around the world — and in space.
The sensor that records your selfies was originally designed for something very different: space photography.
Eric Fossum, an engineer at NASA’s Jet Propulsion Laboratory, invented it in the 1990s, using technology called complementary metal-oxide semiconductors, or CMOS. The technology had been used for decades in computers, but Fossum was the first person to successfully adapt it for taking pictures.
As a bonus, he was able to integrate all the other electronics a camera needs onto the same computer chip, resulting in an ultra-compact, energy-efficient, and very reliable imager. Perfect for sending to Mars or, you know, snapping a pic of your meal.
To learn about NASA spinoffs, visit: https://spinoff.nasa.gov/index.html
Astronauts onboard the International Space station are typically active for at least 9 1/2 hours per day doing science, exercising and maintaining systems. Excluding scheduled time for sleep and lunch, astronauts have only 4 hours of free time during the work week, and that includes time for meals and general hygiene.
Even with a loaded calendar, the few who have such an opportunity to live in the microgravity environment find ways to make the most of this experience. Here are just a few of their favorite things about living in space:
Flying
One of the most self-explanatory (and most fun!) aspects of living in space for the astronauts is “flying”. In space there is no up or down, so there is no floor or ceiling. There are rails throughout the space station that astronauts use to push themselves among the modules.
Eating
Astronauts actually describe the food on the space station as quite tasty! In part, that’s because they have a large role in choosing their own meals. Over time though, a lot of astronauts experience desensitized taste buds from the shifting fluid to their head. Toward the end of their expedition, spicy foods tend to be their favorites because of this phenomenon.
Drinking
Liquid behaves very differently in space than it does on Earth. Astronauts cannot simply pour a cup of coffee into a mug. Without gravity, it would stick to the walls of the cup and would be very difficult to sip. Most of the time, astronauts fill a bag with liquid and use a special straw with a clamp to keep the contents from flying out.
Playing Games
The space station crew occasionally gets downtime which they can spend however they please. Sometimes they watch a movie, read a book or take photos of Earth from the Cupola windows. Other times they invent games to play with each other, and each crew tends to come up with new games. Sometimes it can be hitting a target, flying from one end of the station to the other fastest or playing zero-gravity sports.
Going Out For A Walk
Preparing and executing a spacewalk can take around 8 to 12 hours, and can be a jam-packed schedule. Spacewalkers have to be focused on the task at hand and sticking to the timeline. That said, they can still catch a spare moment to see the Earth 250 miles below. Many astronauts describe that view from a spacewalk as one of the most beautiful sights in their lives.
Watch Commander Scott Kelly and Flight Engineer Kjell Lindgren perform a spacewalk on Oct. 28 at 8:15 a.m. EDT live on NASA Television.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
Explore the universe and discover our home planet with the official NASA Tumblr account
1K posts