Recent simulations and research have unveiled a fascinating new insight into the history of the solar system’s terrestrial planets. For years, scientists speculated about how the rocky planets—Earth, ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

For decades, planet formation existed mostly in theory and simulations. Now, astronomers have captured direct evidence showing how planets begin to take shape inside disks of gas and dust around young ...