What is the role of stars in astronomy?

Answer 1

Galaxies are usually comprised of millions or billions of stars. Stars typically form within the dust and interstellar gas contained withing a galaxy. Our Milky Way Galaxy, for example, contains 200 to 400 billion stars.

Answer 2

The word fusion simply means "A nuclear reaction in which nuclei combine to form more massive nuclei through the release of energy". Nuclei cling to each other just as velcrome does. Gravity would certainly plays a part in how large the star becomes, for the greater the force of gravity, the larger the star. Also the availablity of any material which can be attracted towards the new star. The above answer is from a layman's understanding to the question and the need for an answer.

Answer 3

The word "astro" is Latin for "star." So astronomy literally translates to measurement of the stars. Stars play a primary role in astronomy, in terms of astrophysics or the evolution of stellar bodies. We have worked out the life cycles of stars of varying masses and in relationship to other stars, such as binary pairs.

Amateur astronomers tend to have very little interest in stars, as these are primarily point sources of light exhibiting little if any variation. The big interest in amateur astronomy are galaxies, nebula, comets, and planets. Sometimes also the sun, provided you are careful to use special solar filters. Never look at the sun through a telescope without such filters. What will burn a hole in paper will burn out your retina much more quickly yet.