Group D Stars

welcome to stars by waad hassan , sarah owen and iftikhar imran.

there are many stars in the universe.Each star in the sky is an enormous glowing ball of gas. Our sun is a medium-sized star.

Stars can live for billions of years. A star is born when an enormous cloud of hydrogen gas collapses until it is hot enough to burn nuclear fuel (producing tremendous amounts heat and radiation). As the nuclear fuel runs out (in about 5 billion years), the star expands and the core contracts, becoming a giant star which eventually explodes and turns into a dim, cool object (a black dwarf, neutron star, or black hole, depending on its initial mass). The largest stars have the shortest life span (still billions of years); more massive stars burn hotter and faster than their smaller counterparts (like the Sun).

Stars are massive shining spheres of hot gas, the closest of which is our Sun. Those stars which you see with your naked eye in the night sky all belong to the Milky Way Galaxy, the huge system of stars that contains our solar system. Learn more about stars with these resources.

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