Astronomers from the University of Montreal and around the globe have discovered a new exoplanet whose volcano-carpeted surface could potentially support life — or even spark it.
, described a roughly Earth-sized, temperate planet orbiting a small red dwarf star about 90 light years away, in a southern constellation called Crater.
“For the first time, we have an exoplanet a very strong indication that there is volcanic activity,” said Björn Benneke, an astronomy professor at the University of Montreal who planned and supervised the study. Although the planet’s day side may be too hot for liquid water, Benneke said its night side could be cool enough for water to condense on its surface and even form glaciers. In between the extremes, he says there exists a middle ground with temperatures similar to Earth.
Normally, stars force their planets into a circular orbit. In LP 791-18d’s case, however, another, massive planet — one more than double Earth’s size with over seven times its mass — happens to orbit very close by, Benneke said.
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