please tell me about the stars in the sky. i want to know actually what are these.?

Answer 1

They are the faces of millions of people up in the sky spying on you!

Answer 2

The stars in the sky live for billions of years. The life span of a star depends on the mass of the star. Lower mass stars live the longest, and higher mass stars live shortest.
Low mass stars and medium mass stars have the same life cycle:
1. Rotating nebula containing dust and gases, mainly helium and hydrogen.
2. The nebula develops clumps, which eventually join together and become big enough to produce light.
3. They undergo many years as a normal star, then become a red giant. The giant gradually cool and fade.

Here is the higher mass star life cycle:

1. Rotating nebula containing dust and gases, mainly helium and hydrogen.
2. They live many years as a normal star, then swell into a red super-giant.
3. The high mass star undergoes a massive explosion, called supernova. Then eventually becomes a pulsar star or a neutron cell.
Sometimes really large high mass stars go beyond becoming a pulsar star, and then become a black hole.

I really hope this helps! :) :)

Answer 3

any massive, self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Of the trillions of stars comprising the universe, only a very small percentage are visible to the naked eye. Many stars occur in pairs, multiple systems, and clusters. Themembers of such stellar groups are physically related through common origin and are bound by mutual gravitational attraction. Somewhat related to star clusters are stellar associations, which consist of loose groups of physically similar stars that have insufficient mass as a group to remain together as an organization.

Answer 4

Star, large celestial body composed of gravitationally contained hot gases emitting electromagnetic radiation, especially light, as a result of nuclear reactions inside the star
Stars consist mainly of hydrogen and helium, with varying amounts of heavier elements

Answer 5

Hi. Stars are very similar to the Sun. They are large masses of gas, mostly hydrogen, that fuse the hydrogen into other atoms and produce large quantities of heat while doing so.

Answer 6

they are far-away stars that are glowing. actually the bright light we see may be thousands of light years away. so if a start we are looking at were 1000 light years away and it blew up and was destroyed 100 years ago, we wouldnt know that...it would still look like a bright star.

Answer 7

stars are unit of galaxy, there are about 10^22 stars in one galaxy, they are huge bodies.if they a alive(giving light), their major constitent si hydrogen which acts as a nuclear fuel, which gets converted into helium in process.but the one dead, are huge leftovers of carbon-14, which is formed due to conversion of helium. our sun is a star

Answer 8

Stars are literally a big ball of gas.