Gaia-4b is considered a super-Jupiter planet, a relatively cold gas giant, orbiting its star over 570 Earth-days. That star ...
Using the Keck Planet Imager and Characterizer (KPIC), astronomers have performed high-resolution spectroscopic observations ...
NASA artist’s conception of a brown dwarf (main) and stock image of the planets in the solar system (inset). An object between 2 and 50 times the mass of Jupiter may have flown through our ...
The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun as the orbit of Mars.
Best known for driving demotion of Pluto to dwarf planet, astronomer Mike Brown discusses the next horizons in our solar system, including the hunt for the elusive Planet 9. This article was ...
A new study suggests that a planet-sized object may have passed through the solar system billions of years ... This cosmic visitor, possibly a brown dwarf, may have shaped the paths of Jupiter ...
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