The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we often imagine distances that stretch far beyond the Earth, yet even our ...

Published: July 11, 2024 12:57pm EDT The size of the solar system is defined by the volume of space over which the Sun’s influence exceeds those of other nearby stars in the Milky Way galaxy.

The six found so far are roughly two to three times the size of Earth, but with densities closer to the gas giants in our own solar system. Pitts said most of the planets are smaller than Neptune.

A visitor from beyond the stars has caught NASA’s eye. The interstellar comet 3I/ATLAS, observed between 7 and 15 August, is offering astronomers a rare chance to study material from outside our solar ...