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.

(THE CONVERSATION) There are about 15,000 satellites orbiting the Earth. Most of them, like the International Space Station and the Hubble Telescope, reside in low Earth orbit, or LEO, which tops out ...

Space junk has filled up so much of Earth's orbit that it's endangering satellites and astronauts. The company Kayhan Space issues roughly 1,000 space-collision warnings per day. Earth-orbit experts ...

A "House of Cards" is a wonderful English phrase that it seems is now primarily associated with a Netflix political drama.

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 ...

DALLAS — Beginning Sept. 29, Earth will have a new celestial neighbor— a temporary "mini-moon." What scientists think is an asteroid named 2024 PT5 will orbit our planet in conjunction with our actual ...

The “mini moon” that’s been tagging along in Earth’s orbit recently is departing on Monday — leaving behind a scientific surprise: It may have once been part of our own actual moon. Asteroid 2024 PT5, ...

Earth will have an extra moon for a couple of weeks this fall, and it may return for a second round in a few decades. A 33-foot asteroid named 2024 PT5 is expected to be pulled into orbit around the ...

(CNN) — A small space rock that lingered near Earth last year and was referred to as its temporary “mini-moon” may actually be a chunk of the moon that chipped off thousands of years ago. The ...