It is too far away, too small, and doesn't,reflect enough sun light to make it visible without a telescope.
You could see Neptune from Earth with a telescope if you knew exactly where to look.
Uranus is a gaseous planet with a blue-green color due to the presence of methane in its atmosphere. It appears as a featureless disk when observed from Earth without a telescope. Uranus has a distinctive tilt, with its axis of rotation nearly parallel to its orbit.
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.
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Theoretically it can be seen in perfect conditions with perfect eyesight, but most people would require binoculars to see Uranus. I saw it a few weeks ago, using 7 x 50 binoculars, near the star 60 piscium.
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.
1. Pluto is small. 2. Pluto is VERY far away.
because the comet is so far away theat you cant see it without a telescope
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.
Uranus is a gaseous planet with a blue-green color due to the presence of methane in its atmosphere. It appears as a featureless disk when observed from Earth without a telescope. Uranus has a distinctive tilt, with its axis of rotation nearly parallel to its orbit.
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.
If you could stand on the surface of Uranus (however you cant) you would 89% the force of gravity that you experience on Earth. Another way to look at it is that objects dropped towards Uranus will accelerate towards the planet at 8.69 m/s2.
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