1. Pluto is small.
2. Pluto is VERY far away.
pluto
because the comet is so far away theat you cant see it without a telescope
No, it is 3,627,000,000 miles from Earth. Now that may not be far in comparision with stars and such, but because it is so tiny, and also not in the near vicinity of a bright object (and does not itself generate light) that makes it invisible to the naked eye.
They are too far away
They are relatively small and far away.
You could see Neptune from Earth with a telescope if you knew exactly where to look.
You cant a jet would not work in space.
All of the planets can be seen from Earth, but a telescope or a powerful set of binoculars may be needed to see Uranus and Neptune. All of them cant be seen at certain times, when they are on the opposite side of the solar system on the other side of the sun for example.
Gravity
Mercury is the most unlikely to be viewed because of its proximity to the sun, but it can be viewed with special equipment, like a light filter. All outer planets can be viewed with a telescope depending on the planets position relative to Earth.
The second closest star to Earth, Proxima Centauri, is too faint and dim to be seen with the naked eye from Earth. It is a red dwarf star located over 4 light-years away from us, making it challenging to detect without the aid of a telescope.
oxygen...we cant live without it