by the astecas
A spectrometer is used to determine the composition of stars, and how fast they are going relative to Earth.
looking at the stars moon and other planets
Well, it depends, do planets have to do with stars? If they do you could use Mars.
Because stars not like planets revolve and stars last at the night sky for many many years even at your lifetime.
A telescope
the movements of the Sun, Moon, planets and stars.
By, Looking at the rocks and its different patterns to see where the stars or planets are located and you can probably use its different patterns as a compass.
To see planets, stars, comets and to take pictures.
You use a telescope for looking into space, and looking and stars, planets, moon etc. You could use a telescope as a big binocular. So basically a telescope is used to look at things which are really far away.Telescopes are used for many things:Study spaceScientific experimentsObservationWarHobbiesEquipment for studentsthey use it to observe stars and to identify new stars.
you can see mars and Jupiter but they look like stars unless you use a telescope ------------------------ Because stars shine - give off light - while planets do not.
Light years are used to measure distance from Earth to distant stars and planets.