Stars
The Moon
The sun
Galaxies
Nebulae
Satellites
because some of the planets reflect lights from the sun like Venus.
Telescopes can be used.
You can see all of them in the sky at night.
No. Planets do not have comets. They are not related to planets. They are just objects flying through space that we can see in the sky.
Planets but the look like stars
planets stay in the sky due to the pull of gravity
to see what the planets look like. and to see what they would do over time.
Mars Venus and Saturn
Excluding the sun, Sirius appears brightest in the sky from Earth.
Neptune
You can't
Yes. To date scientists have discovered well over a thousand planets orbiting other stars. It is believe that a large portion of the stars in the night sky have planets.