Here is a breakdown of the size of the planets in our solar system. The smallest planet in our solar system is Mercury. The planet is about 1/3 of the width of Earth with a radius of 1,516 miles.

Stars are known for being some of the largest objects in the cosmos, with some clocking in at upwards of 1,700 times the size ...

A giant gas planet comparable in size to Saturn exists around a small red dwarf star. The discovery is beyond the scope of conventional astronomy theory, and is making experts reconsider conventional ...

NASA has discovered an Earth-size planet orbiting around a faraway star — and it could be habitable. Dubbed TOI 700 e, the exoplanet is the fourth discovered in the TOI 700 system, at 100 light ...

Certain planets are so close to their star that it takes only a handful of days to make one revolution, compared to the Earth which takes 365.25 days. Others slingshot around their star with extrem.

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

The extrasolar planet, or "exoplanet," named Gliese 12 b, orbits a small and cool red dwarf star located just around 40 light-years from Earth in the constellation Pisces.The exoplanet — which ...

The new planet is almost the same size as Earth and swings around its home star, which is called LP 791-18, about once every three Earth days. Average temperatures there could spike to more than ...

The newfound exoplanet, named SPECULOOS-3 b, is a rocky planet roughly 55 light-years from Earth.It zips around its host star every 17 hours, but days and nights on the planet are endless ...

Another Earth-size exoplanet discovered in habitable zone of nearby star. The planet, named TOI 700 e, is one of four known planets orbiting a cool star approximately 100 light-years away.