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 from Earth …

3 days ago · 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.

Jan 20, 2026 · 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 observable universe, …

3 days ago · One of the most conspicuous is Canis Major, the big dog. It’s best known for Sirius, the Dog Star, which is the brightest star in the night sky. Sirius is a third of the way up the southern sky …

Where Do Stars Come From? Every star forms in a huge cloud of gas and dust. Over time, gravity causes the cloud to contract, drawing the gas closer and closer together. As more gas accumulates …

Feb 16, 2026 · Stars are large balls of plasma, predominantly hydrogen and helium. The birth, evolution and death of stars are of particular research interest. Other important topics include understanding …

Mar 5, 2026 · Identify the most prominent stars in the sky! Here, you’ll find stars' names, locations, and myths. Afterward, test your knowledge with our challenging quizzes!

Mar 20, 2019 · These large, swelling stars are known as red giants. But there are different ways a star’s life can end, and its fate depends on how massive the star is.

Star birth can take millions of years and create families of stars. Astronomers see examples of star formation in nebulae throughout our own Milky Way Galaxy and in many other galaxies.

Sep 26, 2022 · How are stars named? And what happens when they die? These star facts explain the science of the night sky.