Because they are sooooo far away.
See related question for distances to our nearestgalaxies.
No. All the stars you see at night are in our galaxy. Stars in other galaxies are much too far away to be seen without a powerful telescope.
At least 3 or 4 galaxies can be seen with the naked eye. Other galaxies can be seen if you watch through a telescope. Basically, in any direction you look, there are galaxies.
No. No. You need a telescope to see Neptune.Nope... Neptune cannot be seen from the Earth without a telescope.
No. No. You need a telescope to see Neptune.Nope... Neptune cannot be seen from the Earth without a telescope.
Mercury can be seen with or without a telescope, depending on the conditions.
This outer planet can be seen from earth without the aid of a telescope.
Yes, Mars can be seen at night without a telescope. It's a "naked eye object".
No. You need a telescope to see Titan.
The nebula that can be seen without a telescope is the Great Orion nebula.
Neptune but only on a very good night i think
Saturn is the last planet that can be seen without using a telescope or binoculars and the planet was known in the ancient world before telescopes were invented. The rings, however, can only be seen using a telescope.
Earth can easily be seen without a telescope, simply look close to your feet, you are standing on it. Earth is the planet that we live on.