A spectrometer.
The scientists who studies planets or heavenly bodies are astronomers. They study by looking from the telescope at night and recording it. Afterwards, they give the information they've found.
From Wikipedia: "De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473-1543)."
Astronomy is the study of heavenly bodies.
Nicolaus Copernicus (1473 -- 1543) is a famous Polish Astronomer.
Telescopes are the main instruments. There are many different types, such as radio telescopes, besides the "usual" optical telescopes. Other instruments such as spectrometers are very useful too.
Spectrograph.
An optical telescope is the simplest instrument to view the heavens.
telescope
Telescope.
Optical or radio telescope
Well, Depending on you question.: Either 1: The Photographer who works at PlayBoy Magazine. or 2: Astronomer. A man works looks at the stars and moons and planet in the universe.
It would be Nicholas Copernicus
Telescope or binoculars
Telescope or binoculars
Telescope or binoculars
Telescope or binoculars
Telescope or binoculars