A spectrometer.
The astronomer who discovered that some heavenly bodies are not stars was William Herschel. In the late 18th century, he identified Uranus as a planet rather than a star, expanding the known boundaries of our solar system. His work laid the groundwork for understanding the differences between stars and other celestial objects, including planets and nebulae. This distinction was crucial in the development of modern astronomy.
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)."
A heavenly body that orbits a planet is called a moon. Moons can vary greatly in size and composition, with some being rocky and others icy. Earth’s moon is one of the most well-known examples, but many other planets in our solar system also have multiple moons.
The Moon is the heavenly body nearest to Earth.
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.
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.
Optical or radio telescope
Telescope or binoculars
Telescope or binoculars
Telescope or binoculars
Telescope or binoculars
It would be Nicholas Copernicus
The astronomer who discovered that some heavenly bodies are not stars was William Herschel. In the late 18th century, he identified Uranus as a planet rather than a star, expanding the known boundaries of our solar system. His work laid the groundwork for understanding the differences between stars and other celestial objects, including planets and nebulae. This distinction was crucial in the development of modern astronomy.