Hundreds of them. Who was first? Probably Galileo. We have no record of anyone point his new telescope at the skies before him. Probably SOMEBODY did; the telescope had been invented 5 years or so before Galileo got his first one, but nobody wrote about it.
Galileo.
telescope,spectroscope,spaceprove,viewer
Galileo Galilei.
scientist study astronomy and when the world ends
In astronomy, he used a telescope.
Radio telescopes are mainly used for astronomy.
Galileo Galilei first used the "new" telescope in 1609
An astronomical telescope is one that is used in astronomy - i.e., to watch stars, planets, comets, etc.
The telescope has extended man's vision into the heavens.
The primary tools used in early astronomy were a compass to measure directions, a sextant (or octant) to measure angles in the sky, a watch and a telescope.
A high energy particle telescope is used in astronomy, and is typically found in space observatories. Like most telescopes, it is used to observe celestial bodies
There are a number of instruments used in the study of astronomy. The telescope is best known, but instruments including satellites, radio waves and simple charts are all used in astronomy.