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Astronomers just discovered a treasure trove of “rogue planets” — free-floating planets that don’t orbit a star but exist all by their lonesome in the depths of space. With masses comparable to that of Jupiter, the 70 or more rogue planets spotted throughout the Milky Way galaxy are the largest such group of cosmic nomads ever found.
Located within the Scorpius and Ophiuchus constellations, the planets were spotted using a suite of telescopes on both the ground and in space. Typically, rogue planets are difficult to image because they aren’t close to any stars to make them visible. However, with data compiled over 20 years from European Southern Observatory (ESO) telescopes, the European Space Agency’s Gaia satellite, and more, Núria Miret-Roig, an astronomer at the Laboratoire d’Astrophysique de Bordeaux, France and the University of Vienna, Austria, and her team were able to capture faint heat signatures emitted from planets that formed within the last several million years.
Read more https://www.theverge.com/2021/12/23/22851798/planets-space-rogue-stars-telescope