Earth’s elliptical path around the Sun does more than keep the planet in a stable orbit. Because that path is not a perfect circle, the distance between Earth and the Sun changes throughout the year, ...

A strip of cool water stretches west from South America along the equator, helping set the pace for some of the planet’s most important weather swings. That Pacific “cold tongue” helps steer the El ...

A surge in satellite constellations, the astronomers warn, would also further obscure observations of deep space. “For scientists, observing the deaths of stars and searching for new planets would ...

It's been 54 years since the last Apollo mission, and since then, humans have not ventured beyond low-Earth orbit. But that's all about to change with next week's launch of the Artemis II mission from ...

Look up on a clear night and you'll see the streaks of our new space age. What you don't see is the growing fallout for the atmosphere that keeps us alive.

Now decades after the fabled Space Race of the 1950 and '60s, humanity's presence in space has dramatically increased. While it is remarkable that humans have so much floating around in Earth's orbit, ...

The region around Earth is becoming increasingly crowded. Thousands of active satellites share orbit with old spacecraft, broken fragments, and debris left behind by past missions. These objects ...