Because comets were created about the same time as the Earth.
The name of great Italian astronomer is Galileo. You need to read his biography. He is great as astronomer and brave soldier as well.
Newton
Kepler
Nicolaus worked for his uncle as a physicain and security.
Early Man first noticed comets. Comets were around long before humans.
It helps us to know about the solar system's early history. That's because we think comets are leftovers from the formation of the planets, etc. They are very old, primitive bodies, like the asteroids.
Asteroids and comets are alike in that they are both heavenly or celestial bodies. Most of them were born early in the formation of the solar system too.
2 answers, comets, and volcanism.
It depends on where the comet is in relation to the earth and sun, but not many comets would be bright enough to be seen before dusk or after early dawn.
Kuiper belt comets the moons of Mars asteroids Oort cloud comets all of the above Correct
Nicolaus Copernicus
Newton discovered this with his Universal Theory of Gravity.