Scientists say the size of this exoplanet is between Mars and Earth, but scientists say that for atmospheric studies of exoplanets, scientists need short orbits around bright stars, but planets are hard to detect. The exoplane L 98-59b measures only 80% of the Earth's size and is 10% smaller than the smallest exoplanet discovered before TESS. It is called L98-59 around the rotating mother star, an M dwarf, about 1/3 of the mass of the Sun, located in the Volans constellation 35 light years away from Earth.
NASA's Kepler mission found it to be only 20% larger than the moon, while the L98-59c and L98-59d were 1.4 and 1.6 times larger than the Earth, respectively. TESS discovers all three planets by observing the transition or periodic drop in stellar brightness. TESS monitors a portion of the sky for 27 days at a time. When TESS completes its first year of observation next month, the L 98-59 system will appear in seven of the 13 regions that make up the southern sky. This will allow the scientific team to pour data into other planets that may have a gravitational impact on the planet.