A 1st-of-its-kind stamp that changes when you touch it, commemorating the August 21, 2017 total solar eclipse. Fred Espenak - whose photos are on the new stamp - tells the story.
The nearest sunlike star is Tau Ceti, only 12 light-years away. It's now known to have at least 4 planets orbiting it, with relatively small masses, tantalizingly close to Earth's mass.
The smoke is from wildfires, an increasingly common occurrence at this time of year. It can't be welcome news to those who've planned trips to that area for the August 21 total solar eclipse.
Major airports around the world will see more frequent flight restrictions in the coming decades because of increasingly common hot temperatures, say scientists.
This checklist - from eclipse master Fred Espenak - will help you plan the perfect total solar eclipse experience! Do your homework and the only other thing you’ll need is perfect weather on August 21!
Grant Miller captured this self-portrait during 2016's Perseid meteor shower. 2017's shower has interference from the moon, but you still might see a bright meteor!
Multi-decade study reveals changes in Antarctica's Dry Valleys and suggests "significant transformations of Antarctic ecosystems are underway now and will continue to be affected by future climate events."