Now I get what
microgravity is, how spacecrafts (even moon) fall around the earth to keep up themselves in their orbits and other related concepts after reading this.
The spacecrafts at certain heights will have to travel at as much as
17,500 miles per hour to stay in their orbits. If they want to orbit at any lower altitudes, they may have to travel faster and at higher altitudes, they can afford to travel slower.
EVA's, the astronauts will have to have their
thrusters on to stay afloat, closer to the spacecraft and do what they wanted to do.
While all these things are understandable, objects outside of the spacecraft floating around is not so much. Shouldn't the objects, right after they are out of the spacecraft, decelerate and so enter the earth's atmosphere within seconds (knowing
micro-gravity is still enough gravity to pull objects towards earth)?
Obviously some of these observations are based on the movie:
Gravity. The dead bodies floating around, one of the astronauts (Sandra) with no thrusters on drifts off of the spacecraft due to momentum - I can't seem to get my head around these things. Do these objects travel at enough speed to fall around the earth, despite being out of the spacecraft which travels at a constant speed? Even though it's the
vacuum, why does the
momentum have so much effect? Surely
gravitional force should be strong enough to pull objects towards earth almost as easily at those altitudes despite apparent lack of air resistance?