The universe is unimaginably vast, even within our own Solar System, the distances between planets are staggering. Light, the ...

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago.. Then the planets began to emerge, as the billions of particles ...

Curious Kids is a series for children of all ages. ... Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky.

Latest in Solar System Astronomers say new interstellar visitor 3I/ATLAS is 'very likely to be the oldest comet we have ever seen' Asteroid 2024 YR4 won't Earth but it could still ruin your day ...

A distant trans-Neptunian object, 2017 OF 201, has been identified at the solar system's edge, potentially qualifying as a dwarf planet with an estimated diameter of 700 km.

Also consider that we see these solar system members because of the sunlight reflected off their surfaces, whether they are solid (moon and Mercury) or cloud covered (Venus and Saturn).