Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

The Hubble Space Telescope has been quietly orbiting Earth for decades, but it’s still one of the most valuable tools we have ...

NASA is sounding a clear alarm about the way SpaceX is reshaping low orbit, warning that the company’s satellite swarms and ...

Astronomers at the University of North Carolina at Chapel Hill have helped uncover new clues about the longest-lasting cosmic ...

As a cold pour hits the glass at The Sycamore in the Mission District, chatter rises, lights dim slightly, and Astronomy on Tap eases into motion, blending a little stargazing spirit with a laid-back ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, ...

Nearly nine out of ten campuses offering physics courses offer an algebra- and trigonometry-based course; nonetheless, this ...

Fleets of satellites interfere with snapshots taken by Earth-bound observatories. But a new study suggests these orbiters ...

A new NASA-led study found that the increasing number of satellites in low-Earth orbit could ruin up to 96% of images from ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

December nights are the longest — and often some of the coldest — of the year. While some may dread December’s darkness, ...

Dec. 4 full moon marks last supermoon of 2025. What we know about Cold Moon, including peak illumination and if it will be ...