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Astronomers estimate that the universe could contain up to one septillion stars – that’s a one followed by 24 zeros. 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 and small amounts of other elements.
- Types
Types of Stars. The universe’s stars range in brightness,...
- Stars and Galaxies
Powerful telescopes on Earth and observatories in space,...
- Types
20 de mar. de 2019 · Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
Discover the wonders of the night sky with NASA's interactive skymap. Learn about stars, planets, constellations and more with a click of your mouse.
A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light.
7 de feb. de 2024 · The stars in each cluster have a variety of masses. The most massive stars are rare, while the least massive stars are the most numerous. Hubble has probed star clusters of all sizes and uses spectroscopy to determine the detailed chemistry in star cluster members.
