Earth's orbit is an ellipse, not a perfect circle. Earth's distance from the Sun varies by about 3 million miles throughout the year. Earth's orbit's semimajor axis is approximately 93 million miles.

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 ...

More objects are being launched into space than ever, and most are headed for low Earth orbit. This region of space has ...

"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 ...

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 ...

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 ...