A fortunate dozen spent a night with the 4.3-meter Lowell Discovery Telescope, happy to be gazing at some great deep-sky ...

I tend to be very biased towards the ground-based optical astronomy because that's our human experience with the night sky and they're the main kind of observations that I was trained in as a student.

The green flash is a rare optical phenomenon above the horizon directly at sunrise or sunset. The color is caused by green ...

In 1987, an enormous blue arc, thought to be hundreds of trillions of miles long, was first considered one of the largest ...

Since 2019, the number of active satellites has more than doubled, reaching nearly 11,700 by May 2025. Satellite constellations, such as SpaceX's Starlink, dominate this space landscape, ...

Finally, in April 2025, MISTRAL delivered stunning images of the supernova remnant Cassiopeia A (Cas-A), one of the sky’s ...

A new device uses quantum optics to filter out starlight in real time — bringing scientists closer to directly observing ...

Born of x-ray astronomy, a novel handheld gamma-optical camera stands at the nexus of medical and industrial imaging. By ...

The sun's corona—the outermost layer of its atmosphere, visible only during a total solar eclipse—has long intrigued ...

An international team of astronomers has discovered 25 new quasars by analyzing multiwavelength data from various surveys.

Merely finding them in the first place — detecting their radio voices and photographing their odd and telltale light— was a cooperative triumph of radio and optical astronomy. It was Schmidt ...

Dubbed AT2024tvd, the burst of radiation from this " tidal disruption event " (TDE) was also picked up by NASA's Chandra ...