The International Space Station, the space shuttle, and satellites are designed to stay in orbit, neither falling to the ground nor shooting off into space. They orbit the Earth about every 90 minutes. So, when you are in orbit, you are in free fall, and are weightless....
That's why astronauts shouldn't spend more than six months on the International Space Station (ISS) at a time. Muscle shrinking(肌肉萎缩) and bone loss In a weightless environment, spacemen don't need to use their muscles to support themselves. So their muscles start shrinking. To keep ...
this way, it wouldn't only look weightless, it would be weightless. of course, this means that they had to shoot scenes like 30 seconds at a time. back to the astronauts the astronauts are in the space shuttle and the space shuttle is in orbit around the earth. but is it accelerating...
But there are other reasons why we should manufacture organs in space. Long-term space missions create a series of physiological alterations in the body of astronauts. While some of these alterations are reversible with time, others are not, compromising future human spaceflights. Studying astronauts...
"Astronauts are basically supine the entire time they are in space," said study lead author Justin Lawley, an instructor in internal medicine at UT Southwestern. "The idea is that the astronauts would wear negative-pressure clothing or a negative-pressure device while they sleep, creating lower ...
D.Because astronauts don’ t want to waste fooA. Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. B. Food for space has to be packed in special ways. Some of it goes into tubes that a man can squeeze into his mouth. Bite...
Many people dream of traveling into outer space.1That’s why astronauts shouldn’t spend more than six months on the International Space Station (ISS) at a time. Muscle and bone loss In a weightless environment, astronauts don’t need to use their muscles to support themselves.2To keep thei...
根据第二段开头两句话“In a weightless environment, astronauts don’t need to use their muscles to support themselves. Therefore, their muscles start shrinking(萎缩).”可知宇航员在失重的环境中不需要使用肌肉,因此他们的肌肉开始萎缩,所以肌肉萎缩的原因是宇航员在太空中不使用肌肉,故选C。
Think: If you really are “weightless”, did anything actually happen to your mass? A: OF COURSE NOT!!! You still have all the same atoms that make you up as you did before (oh…and the anvil does to of course) If you tried to push the Space Station; what do you predict would ...
BEING an astronaut sounds cool, doesn't it? In space, they get to do some pretty amazing things, like floating in zero gravity(重力). However, there are also plenty of things that astronauts can't do because of their weightless environment, and that's very sad. What's worse, they can...