Heat escaping through openings in sea ice influences sea and atmospheric temperatures and wind patterns around the globe - even rainfall around the tropics, says new study.
Milestones for Cassini's final week at Saturn. Today's distant flyby of the large moon Titan will slow down the spacecraft enough so that - on Friday - Cassini will make its final plunge into Saturn's atmosphere.
These maps show how the deluge of fresh rainwater and ocean mixing from hurricane Harvey combined to dramatically alter the surface waters of the Gulf of Mexico.
The start of September means that autumn is just around the corner. Manish Mamtani took this shot in September 2016 in Grand Teton National Park in Wyoming.
Hold out your hand for 10 seconds. A dozen electrons and muons just zipped through your palm. These cosmic rays, scientists believe, come from violent explosions in deep space.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.