Dark matter theory - the idea that a huge fraction of our universe exists in a form we can't see - is a cornerstone of modern cosmology. Ironically, galaxies lacking dark matter might help confirm the theory. Read more.
New findings from Cassini - which orbited Saturn from 2004 to 2017 - confirm that dust and ice from Saturn's rings accumulate on moons orbiting in the rings' vicinity. Read more.
According to the U.S. National Oceanic and Atmospheric Administration, global growth in atmospheric carbon dioxide (CO2) in 2018 was the 4th-highest in 60 years of record-keeping. Read more.
Polaris - aka the North Star - marks the end of the Little Dipper’s handle. The 2 outer stars in the bowl of the Big Dipper always point to Polaris. Read more.
View larger at EarthSky Community Photos. | Gianluca Masi of the Virtual Telescope Project in Rome caught this transit of the International Space Station on the evening of March 24. He wrote: "Not only I could image the entire ISS pass, but I could also recognize all the constellations up there in that very moment. I took the liberty to connect their stars, drawing their ancient shapes." Read more about Gianluca's experience.
