A star

American  

noun

Astronomy.

1. a blue to white star, as Altair, Sirius, or Vega, having a surface temperature between 7500 and 10,000 K and an absorption spectrum dominated by Balmer-series lines of hydrogen.

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Example Sentences

The active galactic nucleus heats the surrounding gas envelope in a way that resembles how fusion heats the outer layers of a star, producing a similar outward appearance.

From Science Daily

Astronomers can confidently identify a star only because they understand stars as giant plasma spheres held together by gravity, generating energy through nuclear fusion.

From Science Daily

Each year Ellie Goan hangs two special decorations on her Christmas tree, a star and bauble - reminders of the two pregnancies she lost.

From BBC

During its life, a star keeps its spherical shape through a very delicate balance between the outward pressure created by the central engine and the gravity that compresses the star.

From Space Scoop

Now you might expect: since a star is a sphere, like a ball, it only makes sense that the explosion is also shaped like a sphere, right?

From Space Scoop