April 22 is the date of Earth Day in part because of Arbor Day, an earlier observance. The focus of Earth Day 2019 is protection of Earth species.
First Earth Day 1970
Here’s a collection of wonderful photos from the EarthSky community in celebration of Earth Day 2019. Thank you all!
Image via Fran Aquino.
Scientists released the OSIRIS Image Viewer to make the amazing images of comet 67P – acquired by the Rosetta spacecraft – easily accessible on the internet.
Comet 67P/Churyumov-Gerasimenko in the days before its perihelion, or closest point to the sun, in August, 2015. The image is intentionally overexposed to show that the number of dust jets leaving the surface during the comet's most active phase is, as these scientists said,
"beyond count." Image via OSIRIS Image Viewer
Intense UV radiation from red dwarf stars was thought to make potentially habitable exoplanets unable to support life. But a new study of the 4 nearest rocky worlds suggests otherwise.
Artist's concept of rocky super-Earth Proxima-b, the closest known exoplanet to our solar system, orbiting the red dwarf star Proxima. Image via ESO/M. Kornmesser.
Easter is this Sunday. Astronomer Guy Ottewell explains why it’s a late Easter, but not the latest it can be.
Image via TheAldertonSwan.
You don’t need to find the radiant to see the meteors. But it’s fun to spot, near the bright star Vega.
Lyrid meteors radiate from near the bright star Vega in the constellation Lyra the Harp.
Paleontologists have named the 430 million-year-old fossil of a tentacled sea creature after horror author H.P. Lovecraft’s Cthulhu monster.
Life reconstruction of Sollasina cthulhu. Illustration via Elissa Martin, Yale Peabody Museum of Natural History.
A new study of fossils unearthed by Depression-era workers reveal that camels, antelopes and relatives of modern elephants and dogs were among the animals that roamed a veritable “Texas Serengeti” millions of years ago.
Image via University of Texas.
The Coma Cluster is one of the richest galaxy clusters known. How many suns and how many worlds might be located in this direction of space?