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Hunter Davis sent these photos from Antarctica this morning of the aurora australis – or southern lights – now appearing over Earth’s South Pole.
While watching Jupiter and the moon around April 9-11, don’t forget Venus! It passed between us and the sun on March 25 and now blazes in the east before dawn.
The 4 largest moons of Jupiter – called the Galilean satellites – are Io, Europa, Ganymede and Callisto. Recent photos here.
After a spring rain …. in this photo by John Entwistle, raindrops sparkle like tiny suns.
Jupiter is the largest planet in our solar system – some 88,789 miles (142,984 km) at its equator. We pass between Jupiter and the sun this week, and Hubble Space Telescope looked its way.
The enormous ring of light that appeared in the night sky on April 2 – above a thunderstorm in the Czech Republic – was a rare and fleeting lightning phenomenon.
Which one looks brighter to you? One is the combined light of many stars. The other is the light of our own star, the sun, reflecting on grains of dust.
Seeing a seahorse shape in the shifting light of an aurora is an example of “pareidolia.”
Winter still lingers on Cape Breton Island, Canada. Photo by Kris Tynski.
It’s rare to see a moon less than 24 hours old, that is, 24 hours past the new phase. But North America had a shot at a younger moon on the night of March 28.
A star whose magnetic field flipped
Black dog, rising moon, San Juan Islands