Overview Earth's orbit is becoming increasingly crowded as thousands of new satellites are launched every year for internet, ...

A best-yet measurement of one of general relativity’s most mind-boggling effects is “another feather in Einstein’s cap” ...

"All these discoveries from pioneering missions like Voyager and New Horizons teach us how little we know about what lies ...

Researchers have long known that there is an asymmetry in the El Niño-Southern Oscillation (ENSO), the confluence of wind and ...

Our satellite stands as the apex of a triangle with two outer planets — Saturn and Neptune — in the early-morning sky.

In the next few years, a private company plans to begin assembling a commercial space station in the Earth’s orbit, the ...

Earth’s aphelion on July 6 puts it farthest from the sun in 2026, but summer heat comes from Earth’s tilt, long days and ...

As the U.S. celebrates its 250th birthday, here's what Benjamin Franklin and other colonists would have seen when they looked ...

Good morning – and also, a quick goodbye. After more than two years and 300 newsletters, this is my final Morning Update. I’m ...

Arizona residents can get into the Independence Day spirit with a July 1 rocket launch from the Vandenberg Space Force Base. Here's what to know.

SpaceX exited 2025 with 9,600 Starlink broadband and mobile satellites in low-Earth orbit. That's about 75% of active maneuverable satellites in orbit as of March 31, 2026. As Starlink has expanded, ...

The summer solstice is Sunday, marking the longest day of the year in the Northern Hemisphere and the start of astronomical summer ...