Star - Wikipedia
A star is a luminous spheroid of plasma held together by self-gravity. [1] The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances …
Star | Definition, Light, Names, & Facts | Britannica
Oct 27, 2025 · A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Of the tens of billions of trillions of stars in the …
Stars - NASA Science
May 2, 2025 · A star’s gas provides its fuel, and its mass determines how rapidly it runs through its supply, with lower-mass stars burning longer, dimmer, and cooler than very massive stars.
What Is a Star and How Does It Work? - ThoughtCo
May 8, 2025 · How does a star work? How do they form, live, and eventually die? Learn more about these distant objects and their major importance in the universe.
Stellar evolution - Wikipedia
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to …
Star - Formation, Evolution, Lifecycle | Britannica
Oct 27, 2025 · Star - Formation, Evolution, Lifecycle: Throughout the Milky Way Galaxy (and even near the Sun itself), astronomers have discovered stars that are well evolved or even …
STAR frequently asked questions (FAQs)
2 days ago · Home STAR resource center STAR frequently asked questions (FAQs) STAR frequently asked questions (FAQs) Find answers to your questions about the STAR program, …