Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).

More objects are being launched into space than ever, and most are headed for low Earth orbit. This region of space has become increasingly crowded with launches from SpaceX and others that have ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

"Mars Orbit insertion" is the point in the mission when the Odyssey spacecraft arrives just short of Mars, fires an onboard rocket to slow its speed relative to the planet, and is captured into a long ...

The story of human progress has always been about the pioneers who dared to cross the river, explore the cave, or sail beyond the horizon. When those who go first return, what was dangerous and ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Space can only keep so many secrets. And, if everything had gone as ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

WASHINGTON -- Once upon a time, gazing at the night sky was an escape from manmade messiness on Earth. Not anymore. Nearly 70 years after the launch of Sputnik, there are so many machines flying ...

Spaceflight’s long-held dream could soon come roaring back. This month, Washington-based Radian Aerospace announced that it’s building a single-stage-to-orbit spaceplane that takes off and lands ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. As a piece of ...