Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing momentum from a launch starting point on Earth. It can take missions ...

Venus is the hottest planet in the solar system due to its thick carbon dioxide atmosphere, trapping heat as part of a ...

How can we successfully collect and return samples from Mercury and Venus to Earth? This is what a recent study presented at ...

"What surprised us, at the end, was how effective this type of impact could be in explaining Mercury's unusual structure ...

The sun just released a burst of a rare form of helium known as helium-3 ( 3 He). What's peculiar is this lightweight, ...

Scientists know of over a dozen planets that orbit twin stars like the fictional “Star Wars” desert planet Tatooine.

Just when you think Snapchat couldn’t get more creative, it drops something that gets everyone buzzing again. Yup, the same ...

They also orbit near their stars, in many cases closer than Mercury is to the Sun. Our solar system, in contrast, appears to be different. “[Planetary scientists] have thought our solar system ...

The solar system has many more moons than the one we ... The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to get the ...