They fire small rockets to change course and altitude. Even though space is mostly a vacuum, Newton proved that every action (e.g., a rocket firing) has an equal and opposite reaction (e.g. changing direction).
No, sound cannot travel through the vacuum of space because it requires a medium, such as air or water, to propagate. Astronauts can hear inside their spacecrafts where there is air, but they cannot hear anything outside in the vacuum of space.
because spacecrafts can see that the earth spins from outer space :)
It's the vacuum that is maintained between the inner and outer containers of the vacuum flask that is the insulator. Heat is unable to move from the inner container through the vacuum to the outer container which is in contact with the outer world.
No.
A Vacuum
Examples of vacuums include the vacuum inside a sealed jar, the vacuum of outer space, and the vacuum inside a vacuum cleaner.
There is no true vacuum in outer space (or anywhere!). Very very roughly, if something 'froze' in outer space, the 'energy' would convert into 'frozen matter'.
Light travels in vacuum but sound cannot. So, we can see solar flares but can't hear them. (Outer space can be considered to be vacuum)
No problem ! Outer space is already a vacuum ... full of it ! I used to read that space is a better vacuum than any vacuum that can be produced in a laboratory on earth. Maybe that's not true any more. Bu the fact remains: Space is a pretty good vacuum. Open a pickle jar in outer space, wait 30 seconds, shake it around a couple times, then screw the cover back on, tight. When you get back, you'll have a jar full of the best vacuum any of your friends have ever seen. (Hard to prove, though.)
Because space is a vacuum.
Only in a total vacuum. Even in outer space there are traces of gas.
The outer surfaces do not need to be shiny. The interior ones do, to reflect heat back rather than let the heat pass out of the vacuum flask. The vacuum between the double walls of the flask also reduces heat loss.