Want this question answered?
-Stars -Asteroids -planets And everything else in space.
Their eyes, ground-based telescopes, space telescopes.
Telescopes, spectroscopes, space probes.
The first cosmologists used telescopes as well as the naked eye to observe the universe. The astrolabe was measured a star's altitude and observatories were built to help with observations. Other tools included armillary spheres and the quadrant.
Ccd's and in large telescopes
they use space probes,satellites,and of coarse,telescopes.
Telescopes, probes, and basically anything else someone would use to study outer space.
-Stars -Asteroids -planets And everything else in space.
Their eyes, ground-based telescopes, space telescopes.
Optical and Radio telescopes.
well they use the telescopes so they can look in space some telescopes have helped people discover new planets
telescopes because they are meant to look into space
We use telescopes or satellites
reflecting and refracting telescopes
observatory
Radio telescopes.
. X-Ray telescopes . Thermal Telescopes . Space Probes Im doing this in school now, and im only 14 so i ain't that intelegent but hope this helps