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

FROSTI is a new adaptive optics system that precisely corrects distortions in LIGO’s mirrors caused by extreme laser power.

The filament of matter stretches 50 million light-years, and contains a row of galaxies 5.5 million light-years long that are ...

A spiral galaxy, shaped much like our Milky Way, has been found in an era when astronomers believed such well-formed galaxies ...

R esearchers have calculated one of the most precise estimates for the expansion rate of the universe today, and it turns out ...

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

Satellite megaconstellations are increasingly impacting astronomical observations. Bright satellite streaks are compromising ...

Observing the wonders of the night sky begins with selecting the right telescope. Join us on Nov. 20, 2025, at 9:00 am EST for Astronomy Unlocked: How to Choose Your Best Telescope. This virtual event ...

A surprisingly mature spiral galaxy named Alaknanda has been spotted just 1.5 billion years after the Big Bang—far earlier ...

SETI’s ‘Noah’s Ark’ – a space historian explores how the advent of radio astronomy led to the USSR’s search for extraterrestrial life ...

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 ...