In our solar system, Jupiter is the biggest planet at 88,846 miles in equatorial diameter — the distance through the planet from one side to the other at its equator — and a mass of 1,898 × ...

HD 189733b, discovered in 2005, is located 64 light-years away in the constellation Vulpecula. This exoplanet, which exists outside our solar system, is about 10 percent larger than Jupiter in ...

New data from the James Webb Space Telescope (JWST) reveals that the "hot Jupiter" exoplanet HD 189733 b likely has an atmosphere that smells like rotten eggs due to the presence of hydrogen sulfide.