Most spacecraft whose end body is Mars travel straight there.
Orbital momentum (or inertia) keeps the planets moving per Newton's First Law; gravitational pull from the Sun causes the orbit to assume an elliptically-shaped path. If effect, they constantly fall (accelerate) towards the Sun but constantly miss it. An explanation appealing to general relativity might assert that gravitation in an effect in which mass curves spacetime, and that planets only travel in straight lines (geodesics) through curved space.
Yes, they do. But they sometimes travel a straight line through bent space.
Sort of, don't forget that there are lots of other stars to bend their paths. AND - according to general relativity their orbits are straight lines in a curved space.
It has been prooved by General Theory of Relativity that light is affected by gravitation........
These paths are called Orbits.
to explore many different planets, galaxies, comets, possible planets we can live on, etc.
All bodies travel in a straight line relative relative to space-time except when influenced by gravity. Meteorites follow the same rules and travel in lines following gravity. They travel so fast that in Earth's atmosphere they tend to burn up while looking as if they are going straight. But they are following the path established by gravity.
Newton
The force of gravity.
It doesn't it can't.... space is a gravitation area filled with gravity. only cold air flows through space because of the wicked temperatures of some planets. You only feel heat from the planets that have the heat because they keep their heat inside due to the greenhouse effect
How do you mean float randomly in space? As space is shaped, due to the planets withing them (gravity), all things that want to travel in a straight line will automatically now follow a curved line, even light, and thus it's not random at all but rather that it's following a path already laid out for it, depending on where it is, how many planets are around it and at what speed it's traveling.
Yes. Without the sun's gravity the planets would move out into interstellar space in straight lines.