WebThe Biggest Stars in the Universe HD - YouTube 0:00 / 2:34 The Biggest Stars in the Universe HD Time vs Arcade 1.79K subscribers 1.2M views 10 years ago Star Size Comparison: The... WebWhat is a star? A star is a big ball of gas. It is not star-shaped. Stars give off heat and light. How is a star made? Stars are born in nebulas. Nebulas are clouds found in space. They are made of gases and dust. A star's …
Stars—facts and information - Science
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WebStars 101 National Geographic National Geographic 21.2M subscribers 1.8M views 3 years ago Countless stars dot the night sky. Learn how these celestial objects form, how they … WebJan 28, 2024 · The main sequence. Besides the small red stars, the medium white stars and the big blue stars, there are of course all the in-between stars, and some strange … Astronomers estimate that the universe could contain up to one septillion stars – which in numbers is 1,000,000,000,000,000,000,000,000. Our Milky Way alone contains more than 100 billion, including our most well-studied star, the Sun. Stars are giant balls of hot gas – mostly hydrogen, with some helium … See more Stars form in large clouds of gas and dust called molecular clouds. Molecular clouds range from 1,000 to 10 million times the mass of the Sun and can span as much as hundreds of light-years. Molecular clouds are cold which … See more At first, most of the protostar’s energy comes from heat released by its initial collapse. After millions of years, immense pressures and temperatures in the star’s core squeeze the nuclei of hydrogen atoms together to … See more At the beginning of the end of a star’s life, its core runs out of hydrogen to convert into helium. The energy produced by fusion creates pressure inside the star that balances gravity’s … See more chennai airport to railway station distance