Six hundred miles above Earth, four near-perfect gyroscopes spun in superfluid helium to chase a prediction most thought was unmeasurable. This is the story of Gravity Probe B, the decades of ...

The downward migration in 2026 involves roughly half of SpaceX's Starlink megaconstellation, which currently consists of ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

Most of the planets we’ve identified are in orbit around stars and formed from the disks of gas and dust that surrounded the ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

Webb telescope discovered a bizarre exoplanet with carbon atmosphere, no hydrogen, orbiting a super-dense spinning star.

Forty light-years away, seven Earth-sized planets orbit around a dim red dwarf star in one of the most tightly packed ...

Astronomers have uncovered a massive gas planet in a place it should never exist, orbiting one of the smallest stars in the ...

Kicking off the year's cosmic wonders is the moon, drawing the first astronauts to visit in more than 50 years, as well as a ...

The “Seven Sisters” of the Pleiades are part of a much larger complex that can help reveal our galaxy’s deep history ...

Planetary alignments, a total lunar eclipse, and meteor showers are highlights to look for in the coming year.

For skywatchers, 2026 kicks off with a great chance to view Jupiter at its biggest and brightest, according to NASA’s latest ...