Mini-Neptune - Wikipedia
A Mini-Neptune (sometimes known as a gas dwarf or transitional planet) is a planet less massive than Neptune but resembling Neptune in that it has a thick hydrogen-helium atmosphere, probably with deep layers of ice, rock or liquid oceans (made of water, ammonia, a mixture of both, or heavier volatiles).
Discovery Alert: Mini-Neptune in Double Star System is a ...
2024年5月21日 · A system called TOI 4633 seems truly strange: a mysterious type of planet known as a “mini-Neptune” traces an Earth-like, 272-day orbit around one of two stars locked in their own orbital embrace.
Mini-Neptunes Might Host Life Under Right Conditions
2024年12月23日 · Researchers with the NASA Astrobiology Institute’s Virtual Planetary Laboratory Lead Team at the University of Washington have described how mini-Neptune planets could become viable for life around M-Dwarf stars.
The Skies of Mini-Neptunes - The Planetary Society
These planets are called super-Earths or mini-Neptunes. They populate an unfamiliar regime of worlds. They are larger than Earth, the Sun’s biggest rocky world, yet smaller than Neptune or Uranus, which are about 4 Earths in diameter.
Mini-Neptune exoplanet may have an ocean or an atmosphere ...
2023年3月17日 · A newly discovered distant mini-Neptune planet may possess its own atmosphere, ocean, or a combination of the two, even if they don't last for long.
Mini-Neptune found in "unstable" two-star system puzzles ...
2024年5月26日 · However, advanced planet-hunting technology has revealed that other planetary systems can be vastly different. The binary system known as TOI 4633 is particularly unusual. It features a “mini-Neptune” that follows an Earth-like orbit around one of …
4 mini-Neptunes play hide and seek - EarthSky
2023年6月15日 · Using data from the CHEOPS space telescope, they found four mini-Neptunes, planets that are less massive than Neptune but significantly more massive than Earth. The planets played hide and seek...
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