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Data from the second probe to reach interstellar space helps scientists form a more complete picture of the boundary between the sun and the stars. 

Charles Q. Choi, Contributor

Quiver at the sight of skeletal galaxies, stellar pumpkins and ghostly interstellar visitors.

Abigail Malate, Staff Illustrator

Researchers find plausible, alien-free explanation for observations of star KIC 8462852.

Charles Q. Choi, Contributor

Enjoy the start of astronomical autumn with black holes, a comet, star clusters and other stunning images.

Abigail Malate, Staff Illustrator

Explore the applications of state-of-the-art clocks -- and the math that describes their performance and limitations.

Yuen Yiu, Staff Writer

Image set in space with watery, bluish planet in foreground and faint star in background.

Planet K2-18b is about twice as wide as Earth and located about 110 light-years away.

Charles Q. Choi, Contributor

Bacteria in one of the most extreme places on Earth point toward past life on Mars.

Sofie Bates, Contributor

Take a tour through the lenses of space telescopes.

Abigail Malate, Staff Illustrator

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