G2 Aurora Storm Forecast For March 23 / Space Station Back At Dusk

Spring brings new vigor to the night sky scene. And the day sky too! After being spotless for weeks, two sunspot groups have popped into view. The larger of the two, named active region 2736, produced a flare early on March 20 that propelled a burst of solar plasma (electrons and protons) toward the Earth.…
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Get Ready For The Spring Equinox Supermoon Mash-Up

Spring feels good. I like the sound of it. I wrung as much cold-night observing, shoveling and cross-country skiing out of winter as I could. There were days I thought my hands would never warm up. So now I’m ready for a change, and you probably are too. Good thing spring’s on the horizon. That’s…
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Did A Collision Just Turn Asteroid Gault Into A Comet?

In late October 2018, a faint asteroid named 6478 Gault suddenly brightened. Two weeks later a most curious thing happened — it grew a tail!  Photos revealed a needle-thin, dust tail that extended for 248,500 miles (400,000 kilometers) — more than the distance between the Earth and the moon. Since its discovery in 1988 Gault…
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Get An Eyeful Of Copernicus, The Moon’s Most Magnificent Pothole

Tonight the sun rises over Copernicus, one of the most magnificent craters on the moon. Unlike the gaping potholes waiting to jar your car this season, a smooth ride is guaranteed. At 58 miles (93 km) across and set off by itself like an old oak tree in a big field, it’s easy to see…
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Beauty In Chaos — Merging Galaxies And Heady Days For The Future Solar System

Today let’s see when what happens when two galaxies collide. The pair featured here is located about 230 million light years away in the constellation of Hercules. When they were first discovered by William Herschel in 1784 they looked like a single object in his telescope and received a single catalog number, NGC 6052. But the…
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