Star

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2,095 published items.

What Are Exoplanets?
Space science

What Are Exoplanets?

Exoplanets are planets beyond our solar system. They range from small rocky worlds to giant planets and can orbit stars very different from the Sun.

September 10, 2026
How Do Astronomers Detect Exoplanets?
Space science

How Do Astronomers Detect Exoplanets?

Astronomers usually detect exoplanets indirectly, by measuring how a planet changes the light, motion, or gravitational behavior of its host star.

September 10, 2026
The latest images of galaxies spiraling together.
Space science

The latest images of galaxies spiraling together.

The Gemini North telescope, located atop Maunakea in Hawaii, USA, has discovered interacting spiral galaxies approximately 60 million light-years away in the constellati…

March 4, 2026
Learn about the star Sirius.
Space science

Learn about the star Sirius.

Sirius is the brightest star in the night sky with an apparent magnitude of -1.47, nearly twice as bright as Canopus, the second brightest star.

March 1, 2026
Are there many planets with life?
Space science

Are there many planets with life?

We know that one in five stars has an Earth-like planet. There are 200 billion stars in our galaxy alone.

September 15, 2025