The name Blue Moon used to indicate something rare. Not anymore! Popular culture has defined several kinds of Blue Moons. The next one will be March 31.
Most Blue Moons are not blue in color. This photo of a moon among fast-moving clouds was created using special filters. Image via EarthSky Facebook
friend Jv Noriega.
A lack of precipitation across the southern and western United States has led to growing drought this winter.
Image via climate.gov.
People around the world last night caught the moon near the bright star Aldebaran in the constellation Taurus the Bull.
Octopuses and cuttlefish have an amazing defense tactic. They can erect 3D spikes from their skin, hold them for an hour, then retract them and swim away.
A Marine Biological Laboratory study examines the neural and muscular mechanisms that underlie the cuttlefish's ability to erect papillae as a camouflage tactic.
Courtesy ofPaloma Gonzalez-Bellidodownload
The long-lived Opportunity Mars rover keeps finding surprises, including these possible stone stripes. On Earth, similar features result from repeated freezing and thawing of wet soil.
Textured rows on the ground in this portion of "Perseverance Valley" are under investigation by NASA's Mars Exploration Rover Opportunity, which used its Navigation Camera to take the component images of this downhill-looking scene. The rover reaches its 5,000th Martian day, or sol, on February 16, 2018. Image via NASA/JPL-Caltech.
How to find to find the constellation Taurus in your night sky. Plus the names of some of its bright stars and star clusters and its mythology.
Image © Ian Ridpath.
A first quarter moon rises around noon and sets around midnight.
Elizabeth Worthy Clark caught the first quarter moon as it was setting on February 23.
Mount Sinabung on the Indonesian island of Sumatra erupted violently on February 19, 2018. See video of the dramatic first moments of the eruption.
Image via NASA
Supernovae – exploding stars – are unpredictable. But an amateur astronomer in Argentina happened to catch one just as it began to explode. “It’s like winning the cosmic lottery,” one astronomer said.
Supernova 2016gkg in NGC 613; color image taken by a group of UC Santa Cruz astronomers on Feb. 18, 2017, with the 1-meter Swope telescope (Carnegie Institution for Science, Las Campanas Observatory, Chile).