The largest moon of Saturn is bigger than Mercury, yet for all its conspicuousness, scientists don't know exactly how it came ...

If you've been following exoplanet research over the last couple of years, you've definitely heard of K2-18b. Located 124 ...

One of our universe's biggest stars has dramatically turned into a rare, yellow 'hypergiant' star, and astronomers aren't sure when it will go supernova.

A newly detected X-ray transient may reveal the first direct evidence of an intermediate-mass black hole consuming a white dwarf. A newly observed cosmic outburst is giving astronomers a rare glimpse ...

Across modern astronomy, the most striking pattern is not a single spectacular discovery but a drumbeat of similar clues. Wherever telescopes and probes look with enough sensitivity, they keep turning ...

A team of 48 astronomers from 14 countries, led by the University of Massachusetts Amherst, has discovered a population of dusty, star-forming galaxies at the far edges of the universe that formed ...

In the very young universe, just a fraction of its current age, astronomers have stumbled on a set of objects that refuse to behave the way galaxies are supposed to. Compact, brilliant and oddly ...

A distant star dimmed by 97% for nearly 200 days. Astronomers say giant rings around a brown dwarf or super-Jupiter may explain it.

Astronomy does not belong off Earth. It belongs wherever the universe can be observed — and that necessarily includes the surface of the planet humans live on. Kelsey Johnson: Past President of the ...

A distant star system with four super-sized gas giants has revealed a surprise. Thanks to JWST’s powerful vision, astronomers detected sulfur in their atmospheres — a chemical clue that they formed ...

Astronomers may finally understand why planets orbiting two suns, the real-world equivalents of the "Star Wars" planet ...