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Going the distance: A Guardian’s marathon journey realized through DAF Sports
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
What are the dangers of going to space?
For human spaceflight, the first thing I think about is the astronauts actually strapping themselves to a rocket. And if that isn’t dangerous enough, once they launch and they’re out into space in deep exploration, we have to worry about radiation.
Radiation is coming at them from all directions. From the Sun, we have solar particles. We have galactic cosmic rays that are all over in the universe. And those cause damage to DNA. On Earth here, we use sunscreen to protect us from DNA damage. Our astronauts are protected from the shielding that’s around them in the space vehicles.
We also have to worry about microgravity. So what happens there? We see a lot of bone and muscle loss in our astronauts. And so to prevent this, we actually have the astronauts exercising for hours every day. And of course we don’t want to run out of food on a space exploration mission. So we want to make sure that we have everything that the astronauts need to take with them to make sure that we can sustain them.
There are many risks associated with human space exploration. NASA has been planning for these missions to make our astronauts return home safely.
[END VIDEO TRANSCRIPT]
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Last Updated Apr 02, 2025 Related Terms
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By Space Force
the Department of the Air Force released the memorandum Department of the Air Force Civilian Workforce Hiring Freeze Guidance rescinding and replacing the previously provided memorandum Department of the Air Force Hiring Freeze.
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By European Space Agency
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By NASA
NASA, ESA, CSA, STScI Two actively forming stars are responsible for the shimmering hourglass-shaped ejections of gas and dust that gleam in orange, blue, and purple in this representative color image captured by NASA’s James Webb Space Telescope. This star system, called Lynds 483, is named for American astronomer Beverly T. Lynds, who published extensive catalogs of “dark” and “bright” nebulae in the early 1960s.
The two protostars are at the center of the hourglass shape, in an opaque horizontal disk of cold gas and dust that fits within a single pixel. Much farther out, above and below the flattened disk where dust is thinner, the bright light from the stars shines through the gas and dust, forming large semi-transparent orange cones.
Learn what the incredibly fine details in this image reveal.
Image credit: NASA, ESA, CSA, STScI
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