One of the Trappist-1 Planets Has an Iron Core...

Universe Today | 2018-05-03 21:01 UTC

In February of 2017, a team of European astronomers announced the discovery of a seven-planet system orbiting the nearby star TRAPPIST-1. Aside from the fact that all seven planets were rocky, there was the added bonus of three of them orbiting within TRA

By ceres on 2018-05-04 16:53 UTC
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