Mars, the fourth planet from the Sun, is a subject of fascination for astronomers. Though significantly smaller than Earth, ...

But just how big can these planets get, and what's the biggest planet we know of? Prior to 1992, when the first exoplanet was discovered, the gas giant Jupiter, which is about 11 times as wide as ...

Neptune is the farthest planet from the sun and was the first to be predicted before it was discovered. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

Amaury Triaud, professor of exoplanetology at the University of Birmingham, who co-led the study said: “It is fairly easy to measure the amount of carbon dioxide (CO2) in a planet’s atmosphere.