An article published in “The Astronomical Journal” reports a study on the characteristics of the orbit of the exoplanet KELT-9b, an ultra-hot Jupiter very close to its star. A team of researchers led by John Ahlers of the Exoplanets and Stellar Astrophysics Laboratory at NASA’s Goddard Space Flight Center used data collected by NASA’s TESS space telescope to create a model of the interaction between star and exoplanet that allowed to understand better the peculiar characteristics of the star and the extreme ones of KELT-9b. For example, it turned out that the star spins so fast that its poles are flattened making them hotter, and the exoplanet orbits around those poles with the consequence that it has two summers when it passes over them while it has two winters when it passes over the star’s equator.