Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size.
Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...
Astronomers have discovered a “forbidden” planet that appears to be far larger than should be possible given its circumstances. A team of researchers investigated a candidate exoplanet called TOI ...
Astronomers spotted a potential Earth-size rocky world orbiting a white dwarf, suggesting a future in which our planet outlives its star. By Jonathan O’Callaghan In six billion years the sun will ...
An illustration showing the relative sizes of brown dwarfs as compared to starts and gas giant planets, courtesy of Carnegie Institution for Science. Disclaimer: AAAS and EurekAlert! are not ...
About 650 light-years from here, in the constellation Aquarius, lies the planetary nebula Caldwell 63, commonly known as the Helix Nebula. It’s the slowly cooling corpse of a dead star, a vast cloud ...
Scientists tracked the dwarf planet Eris as it passed in front of a star, finding that it's probably about the same size as Pluto. "Whether or not you agree with the IAU's 2006 resolution on the ...
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