Discovery of a hot rocky world with Earth-like density orbiting a young star

Star system: TOI 5734 | Distance from the Sun: 106 light years

Astronomers have confirmed the existence of TOI-5734b, a 'hot sub-Neptune' planet orbiting a star slightly smaller and cooler than our Sun. Despite being about twice the size of Earth and nine times its mass, the planet has a density remarkably similar to our home world. This suggests that TOI-5734b is likely a rocky planet that has lost most of its original atmosphere due to the heat of its nearby young star. 

Located in a system only about 500 million years old—compared to our solar system's 4.5 billion years—this discovery provides a rare opportunity to study how planetary atmospheres evolve and disappear in their early stages.

Scientific study

The GAPS Programme at the TNG: LXX. TOI-5734b: A hot sub-Neptune orbiting a relatively young K dwarf with an Earth-like density (external link)