Ninety Gravitational Wave Spectrograms and Counting
Every time two massive black holes collide, a loud chirping sound is broadcast out into the universe in […]
NASA
Space Station Silhouette on the Moon
What’s that unusual spot on the Moon? It’s the International Space Station. Using precise timing, the Earth-orbiting space […]
Total Solar Eclipse Below the Bottom of the World
Yesterday there was a total solar eclipse visible only at the end of the Earth. To capture the […]
Iridescent by Moonlight
In this snapshot from November 18, the Full Moon was not far from Earth’s shadow. In skies over […]
Comet Leonard and the Whale Galaxy
Sweeping through northern predawn skies, on November 24 Comet Leonard (C/2021 A1) was caught between two galaxies in […]
NGC 6822: Barnard s Galaxy
Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in […]
A Blue Banded Blood Moon
What causes a blue band to cross the Moon during a lunar eclipse? The blue band is real […]
In Motion: Uranus and Moons
What’s that moving across the sky? A planet just a bit too faint to see with the unaided […]
The Extraordinary Spiral in LL Pegasi
What created the strange spiral structure on the upper left? No one is sure, although it is likely […]
A High Cliff on Comet Churyumov Gerasimenko
This high cliff occurs not on a planet, not on a moon, but on a comet. It was […]