Monisha Ravisetti is Space.com's Astronomy Editor. She covers black holes, star explosions, gravitational waves, exoplanet discoveries and other enigmas hidden across the fabric of space and time. Previously, she was a science writer at CNET, and before that, reported for The Academic Times.
Temperate exoplanet LHS 1140 b may be a world completely covered in ice similar to Jupiter’s moon Europa or be an ice world with a liquid substellar ocean and a cloudy atmosphere . LHS 1140 b is 1.7 times the size of our planet Earth and is the most promising habitable zone exoplanet yet in our search for liquid water beyond the Solar System.The search for habitability elsewhere in the universe can arguably be reduced to the search for water.
"Of all currently known temperate exoplanets, LHS 1140 b could well be our best bet to one day indirectly confirm liquid water on the surface of an alien world beyond our solar system," Charles Cadieux, lead author of a paper on the discovery and a doctoral student at the Université de Montréal,in the constellation Cetus which, as luck would have it, translates to"the whale.
It was necessary because, for a long time, there was something like a gap in the literature about LHS 1140 b. Basically, the trouble was that scientists couldn't quite confirm whether the exoplanet is a mini-Neptune — a planet less massive than our original, but one that still has Neptunian characteristics — or a super Earth. A super Earth is a world that's larger than Earth, but still either rocky or water-rich.
It is certainly worth noting that LHS 1140 b isn't exactly fully alone in its exhilarating characteristics; there are also a variety of other habitable-zone exoplanets scientists are drawn to. The most obvious are probably the seven worlds of thesystem, a planetary lineup that looks almost disturbingly similar to our solar system's structure. The septet of orbs resembles our octet .
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