the most distant planet that can be seen without the unaided eye?

Answer 1

In astronomy, the naked-eye planets are the five planets of our solar system that can be discerned with the naked eye without much difficulty. Hence, they were the only planets known to the ancients prior to the invention of the telescope. They are Mercury, Venus, Mars, Jupiter, and Saturn, the five planets closest to Earth.

Uranus is visible to the naked eye in principle on very clear nights, but unlike the true naked-eye planets it is always less luminous than several thousands of stars, and as such, does not stand out enough for its existence to be noticed without the aid of a telescope.

Answer 2

The correct answer to that question would be Neptune. This is because all planets are visisble to the unaided eye, but you can't recognize them because some of them look like stars. If you wanted the absolute brightest planet that's farthest, it would be Saturn. Before the invention of telescopes, Saturn was considered by the ancients to be the farthest planet.

Answer 3

Uranus, magnitude 5.7, from dark skies (and no moon).






Don't expect it to be obvious.






Fine. Neptune, magnitude 7.8, if you stare and try really really hard from the darkest most perfectest sky ever and you're completely dark adapted and know exactly where to look and it's high in the sky and far from the Milky Way and your eyesight is perfect and you have observing experience and you use averted vision and you're content to second guess "did I really see it or did I just imagine it?" then maybe you might think you saw Neptune. It's not impossible. Experienced observers have been known to see as dim as magnitude 8.0 as the Bortle Dark-Sky Scale shows.

But that's not what you meant though, right?

Answer 4

without the unaided eye, mean with an aided eye, which means a planet a few light years away.

Answer 5

The most distant planet that can be seen with the naked eye is Saturn. After that, forget it.

Answer 6

if you are doing it "without" the unaided eye you can't see anything to begin with...

Answer 7

If you know where to look and have good eyesight it is possible to see Uranus but for most people Saturn is the furthest we see easily.

Answer 8

jupiter