Messier 101
Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier’s famous catalog, but definitely […]
astronomy
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. […]
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 […]
M33: The Triangulum Galaxy
The small, northern constellation Triangulum harbors this magnificent face-on spiral galaxy, M33. Its popular names include the Pinwheel […]
NGC 1333: Stellar Nursery in Perseus
NGC 1333 is seen in visible light as a reflection nebula, dominated by bluish hues characteristic of starlight […]
Video of a Green Flash
Many think it is just a myth. Others think it is true but its cause isn’t known. Adventurers […]