"Cosmic archaeologists" have discovered an iron-deficient second-generation star, which provides evidence of how ancient ...

In the year 185 C.E, Chinese astronomers spotted a supernova and dubbed it the "guest star." The National Science ...

Kepler-51d is the coolest and least dense of the planets in this planetary system. “We think the three inner planets orbiting ...

Brown dwarfs get a bad rap in the stellar world, often labeled as "failed stars" for their inability to sustain nuclear ...

Discovered in 1930 at the Lowell Observatory, Pluto was demoted as a planet in 2006. Some want President Trump to take action via executive order.

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...

They discovered that the host galaxy is incredibly massive — weighing in at over 40 billion times the mass of our Sun — and deeply obscured. The James Webb Space Telescope, which can peer through gas ...

The first time I heard about galaxies without dark matter, I was sitting in my very first graduate class at the University of São Paulo. A team had found a small, strange galaxy that appeared to ...

Scientists have identified a previously unknown type of planet beyond our solar system – one capable of storing vast quantities of sulphur deep beneath a permanent ocean of molten rock. The study, led ...

A team of astronomers led by the University of Oxford has identified a new class of liquid planet, a world defined not by oceans of water, but by a global, thousands-of-miles-deep reservoir of molten ...

An international team of astronomers has discovered one of the most primitive stars in terms of chemical composition — a second-generation object formed immediately after the first stars of the ...

NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump sign an executive order?