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 […]
Science
Messier 101
Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier’s famous catalog, but definitely […]
Great Refractor and Lunar Eclipse
Rain clouds passed and the dome of the Lick Observatory’s 36 inch Great Refractor opened on November 19. […]
At the Shadow s Edge
Shaped like a cone tapering into space, the Earth’s dark central shadow or umbra has a circular cross-section. […]
NASA Launches New Mission: Crash Into Asteroid, Defend Planet Earth ...
The Double Asteroid Redirection Test spacecraft, launched on Wednesday, could be the first to alter an asteroid’s path, […]
NASA Just Launched a Spacecraft That Will Crash Into an ...
An early morning liftoff kicks off DART, NASA’s first mission to test a spacecraft that could one day […]
Pleiades: The Seven Sisters Star Cluster
Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it […]
The Sun in X rays from NuSTAR
Why are the regions above sunspots so hot? Sunspots themselves are a bit cooler than the surrounding solar […]
Lunar Eclipse over a Skyscraper
Why is the Moon on top of this building? Planning. It took the astrophotographer careful planning — including […]
Introducing Comet Leonard
Here comes Comet Leonard. Comet C/2021 A1 (Leonard) was discovered as a faint smudge in January 2021 when […]