NASA's Transiting Exoplanet Survey Satellite (TESS) has discovered an extraordinary planet that's roughly the size of Earth but is only one-tenth of our planet's age, with half of its surface likely dominated by scorching-hot lava.
The exoplanet orbits a sun-like star called HD 63433, which is located 73 light-years from Earth, at a proximity of around 12% the distance between Mercury and the sun. This is so close that the planet, designated HD 63433 d, completes an orbit in just 4.2 Earth days.
