through a telescope :)
You see them by reflected sunlight.
Actually, there are 18 known planets in our solar system, as well as two known protoplanets. For a complete list of objects in the solar system, see the related links.
The Sun; planets; moons; dwarf planets; asteroids; meteoroids; interplanetary dust and gas; comets; solar wind...
We know of eight (8) in our solar system, and we know of a few hundred other stars that have planets although we can't actually see the planets.
the reason you can see the planets in our solar system is because, they reflect the suns light off of their atmosphere or sufrace.
they are very far away
National Geographic Society= 11 Planets: A New View of the Solar System by David Aguilar =Amazon link [See Link]
I call it a star system. Other people may call it a solar system, but I see this as inaccurate because the adjective "solar" is derived from "Sol," the name of our star.
Assuming you have functioning sight, you look up on a dark clear night.
You can see five of the planets in our Solar System with the naked eye - they appear as bright stars. To see Uranus and Neptune, you need telescopes.
to have something to look at when you can see them
The Uranus was the newest planet of the Solar System. I think this was made in 90s but there are no newest planets in the Solar System. The Planets in the Solar System is: Mercury Venus Earth Mars Jupiter Saturn Uranus (Newest) Neptune Pluto (Dwarf Planet/Planet) As you can see, there's no two "(Newest)" in the lists of planets but there is one but sorry, the list did not change.