the light rays that are 'bent'[refracted] as they pass through a prism, and then focused upon the receiving 'tray' that contains the film that is processed to form Spectrographs.
Spectrographs are of two types: emission - spectral lines that result from the emission of photons at absolutely specific spectral lines [wavelengths], and - absorption spectral lines that are missing due to the absorbent nature of the interstellar gas & matter clouds that the Source Light passes through.
Constellations are the patterns formed by stars in the sky at night. The least common constellation is the "Big Dipper."
No. Ancient peoples attributed patterns to the stars.
The celestial bodies of our solar system are believed to have formed from the solar nebula. The solar nebula was a giant cloud of dust and gas that was left behind after the formation of the sun.
so they can find out about the early solar system and how planets were formed
Becuase nebulae tell us how stars get formed so the composition, density and size of a nebulae cloud says a lot about its age, likelihood of stars forming and the type of stars that might form.
By studying rocks from Earth, from the Moon and meteorites it is believed that the age of the Solar System is approximately 4.6 billion years old.
shadows formed by heavenly bodies
they use tools.
There is no answer
Yes they do. See related question.
Astronomers Believe That The Solar System Began As A Huge Cloud Of Dust And A Gas Called ''NEBULA''
Constellations are the patterns formed by stars in the sky at night. The least common constellation is the "Big Dipper."
studying a modern river valley to learn about how ancient rocks layers are formed!
You can notice sandbanks along many high tide bodies of water. These are formations that feature long wavelike patterns in the sand. Sandbanks are formed when sediments are deposited by waves and tides.
to educate physicians, astronomers and mathematicians.
astronomers believe that asteroids were formed by a colision with much larger body near mars and thay formed asteroid belt
Cosmic Background Radiation