Sun Won’t Quit — Aurora May Return Tonight Thru Wednesday

I almost didn’t wake up in time for this morning’s occultation of Aldebaran by the last quarter moon. Let’s just say I made myself get up. Sure glad I did. Despite some fire haze, Aldebaran waited just off the moon’s edge through the telescope. The contrast of that bit of fire with the broad, daylight-tinted…
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Sunspot’s Parting Gift — A Spectacular Loop Prominence / Aldebaran Goes Bye-Bye

What a sunspot show it was. The huge group, AR 2673, visible with the naked eye, produced an X9.3 flare on September 6th, the most powerful recorded since 2005. For the next few days, it quieted down a bit and then went ballistic again. At 11:06 a.m. Central time Sunday, the region erupted with at the…
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Strong Geomagnetic Storm Hits Tonight Sept. 7-8

The big aurora blast we were waiting for appears to have fizzled with only a minor spike in activity. But the sun has more in store. Wednesday’s giant X9.3 flare in sunspot group 2673 sparked a coronal mass ejection (CME) that’s arrived sooner than expected. It slammed Earth’s magnetosphere around 6 p.m. (Central time) this evening and…
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Big Sunspot Sends Blast Our Way, Storm Expected Sunday

After a few days of all show and no action, that big, scenic sunspot group let loose a powerful M-class flare early yesterday evening. The blast sent a giant cloud of solar plasma — electrons and protons bundled with magnetic energy — in Earth’s direction that’s expected to arrive Sunday (July 16) around lunch time and…
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Try Out Your Eclipse Glasses On This Big Sunspot

A rapidly growing sunspot that rotated around the Sun’s limb several days ago has now expanded to about 78,000 miles (125,000 km) across, only 10,000 miles shy of Jupiter’s girth. It was easy to see with the naked eye as a small, dark imperfection on the sun’s otherwise spotless face through my #14 welder’s glass…
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