WD J2147-4035, an 11-billion-year-old white dwarf located 91 light-years away in the constellation of Grus, is accreting debris from orbiting planetesimals,...
Using data from NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton spacecraft, astronomers have looked for the effects of massive, close-in planets...
Gliese 1252b, a super-Earth exoplanet that orbits an M-dwarf star 67 light-years away, retains only a tenuous mineral exosphere.
An artist’s impression...
TOI-3757b is the lowest-density transiting exoplanet known to orbit an M-dwarf (red dwarf) star.
An artist’s impression of TOI-3757b and its parent star....
Using data from NASA’s Transiting Exoplanet Survey Satellite (TESS) and several ground-based telescopes, astronomers have detected and characterized...
Barium, a chemical element with the symbol Ba and atomic number 56, is the heaviest element detected to date in any exoplanetary atmosphere.
This artist’s...
The triple star system LTT 1445, at a distance of 22.5 light-years, hosts some of the nearest rocky planets.
This Chandra image shows the LTT 1445 system:...
Methylated gases are made when organisms add a carbon and three hydrogen atoms to an undesirable chemical element. Called methylation, this process can...
Nitrous oxide (also known as laughing gas) — a product of microbial nitrogen metabolism — is a compelling exoplanet biosignature gas with distinctive...
Astronomers using NASA’s Transiting Exoplanet Survey Satellite (TESS) have discovered a Jovian planet orbiting the M4-type dwarf TOI-5205. Their paper...
LkCa 15, also known as IRAS 04363+2215, EPIC 247520207 or TIC 118681038, is a K5-type star with a mass of 1.2 solar masses.
An artist’s illustration...
Exoplanets smaller than Neptune are common around red dwarf (M-dwarf) stars, and many of those that transit their host stars constitute the bulk of known...
Astronomers using NASA’s Transiting Exoplanet Survey Satellite and the SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) telescopes...
Using the NASA/ESA/CSA James Webb Space Telescope, astronomers have captured a direct image of HIP 65426b, an extrasolar gas giant about 6 to 12 times...
Carbon dioxide is a key chemical species that is found in a wide range of planetary atmospheres.
This transmission spectrum of WASP-39b was captured by...
Astronomers using NASA’s Transiting Exoplanet Survey Satellite (TESS) and the SPIRou spectropolarimeter on the 3.6-m Canada-France-Hawaii telescope have...
The International Astronomical Union (IAU) has announced a contest to name extrasolar planetary systems to be observed by the NASA/ESA/CSA James Webb Space...
With an effective temperature of 8,500 K, the A-type star HD 56414 is one of the hottest stars known to host a planet smaller than Jupiter.
An artist’s...
Using the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have detected the emission from 13CO — measure of the molecular gas distribution...
