Exoplanets

Astronomers have mapped the thin ring of atmosphere at the edge of a giant planet angle by angle, and measured the side turning into evening about 650 K hotter than the side turning into morning.…

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have found rings, gaps and cavities inside four of 11 very small planet-forming disks, a class of disk that had looked smooth…

Every planetary system astronomers find gets measured against ours. It is the only one we can examine up close, so it became the ruler: eight planets on nearly circular orbits, nearly in the same…

Three planets a little larger than Earth have been statistically validated around TOI-789, a small, cool red star 43 parsecs away, or roughly 140 light-years, in a paper published Oct. 7, 2026, in…

A reanalysis of ultraviolet spectra the Hubble Space Telescope took in 1999 has found the white dwarf HS 0209+0832, the burnt-out core of a dead star, pulling in material that matches nothing in the…

Deepayan Banik and colleagues report that a planet keeping one face permanently toward its star can end up with a night side warmer than its day side, if the starlight it receives rises and falls as…

Astronomers have confirmed a planet about twice the width of Earth orbiting TOI-210, a small, cool red dwarf, once every 9.01 days. The result comes from a preprint posted to arXiv on Sept. 28 by a…

Astronomers using NASA's James Webb Space Telescope have assembled 21 young star systems whose dust appears to be the wreckage of collisions between rocky bodies, and have sorted them into two groups…

Astronomers with the NEID Earth Twin Survey report a planet at least 3.6 times the mass of Earth orbiting HD 126053, a Sun-like star within 25 parsecs of Earth, about 80 light-years away. The finding…

Astronomers have ruled out a giant planet around 70 Ophiuchi, a pair of Sun-like stars about 17 light-years away, after a century of watching them. A team led by Yiting Li of the University of…

The scenario is decades old and mostly drawn from simulations. A young gas giant plows through the disk of gas and dust it was born in, and the gas closest to it stops moving the way the rest of the…

There is a stretch of the HR 8799 system that conventional direct imaging has struggled to see. Four giant planets circle the star in the best-known set of pictures in exoplanet astronomy, and every…