Comment by imtringued

That would only rule out stories based on interstellar travel, which is a tiny subset of what you can do in space. After all, you'll just end up inside another solar system that won't be much different from ours. The planets will be in different orbits but there will most likely be an asteroid belt and the effects of temperature will remain the same even if the planets are in different temperature ranges from our planets.

If earth is big enough for fantasy, then the solar system is plenty big enough for science fiction.

If you wanted to watch hard science fiction I would recommend watching anthrofuturism on YouTube who focuses exclusively on the moon.