保护地球，探索宇宙，发现文明
2021年02月28日 The Aurora Tree Image Credit & Copyright: Alyn Wallace Explanation: Yes, but can your tree do this? Pictured is a visual coincidence between the dark branches of a nearby tree and bright glow of a distant aurora. The beauty of the aurora — combined with how it seemed to mimic a tree right nearby — mesmerized the photographer to s...
2021年01月14日 Aurora Slathers Up the Sky Image Credit: Jack Fischer, Expedition 52, NASA Explanation: Like salsa verde on your favorite burrito, a green aurora slathers up the sky in this 2017 June 25 snapshot from the International Space Station. About 400 kilometers (250 miles) above Earth, the orbiting station is itself within the upper realm of the auroral...
2021年01月13日 Arches Across an Arctic Sky Image Credit & Copyright: Giulio Cobianchi Explanation: What are these two giant arches across the sky? Perhaps the more familiar one, on the left, is the central band of our Milky Way Galaxy. This grand disk of stars and nebulas here appears to encircle much of the southern sky. Visible below the stellar arch is ...
2021年01月03日 A Phoenix Aurora over Iceland Image Credit & Copyright: Hallgrimur P. Helgason; Rollover Annotation: Judy Schmidt Explanation: All of the other aurora watchers had gone home. By 3:30 am in Iceland, on a quiet September night, much of that night’s auroras had died down. Suddenly, unexpectedly, a new burst of particles streamed down from...
2020年11月9日 In Green Company: Aurora over Norway Image Credit & Copyright: Max Rive Explanation: Raise your arms if you see an aurora. With those instructions, two nights went by with, well, clouds — mostly. On the third night of returning to same peaks, though, the sky not only cleared up but lit up with a spectacular auroral display. Arms went hi...