An article published in “The Astronomical Journal” reports the discovery of the exoplanet LHS 1815b thanks to NASA’s TESS space telescope. A team of researchers led by Tianjun Gan of Tsinghua University in Beijing, China, confirmed the existence of that planet using various ground-based photometric, spectroscopic and photographic instruments. The conclusion is that its size is slightly higher than the Earth’s, but it’s much denser for a mass up to 8.7 times the Earth’s. The most unique feature is that it’s the first exoplanet discovered in the Milky Way’s so-called thick disk, one of the structures that make up about two thirds of disk galaxies.