For decades, astronomers have mapped the Milky Way using visible light, but much of our galaxy has remained hidden behind ...

That discrepancy exists because the meteorological calendar, which has 365 days in a year, doesn’t quite map onto the ...

For 19-year-old Gael Gomez, the Mount Pleasant Sidewalk Astronomers has changed his life for the better. But soon, he may be ...

Astronomers have obtained unprecedented images of two star explosions, revealing complex ejection processes and delayed ...

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 ...

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 ...

In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

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 ...