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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Zuben-El-Akrab Gets Pinched By The Moon Tonight

I enjoy a good occultation. Tonight, the gibbous moon occults the star Zuben-el-akrab in Libra. You can watch it snap out of view in a small telescope during the early evening hours. The star is better known as Gamma Librae; the Arabic name translates to “claw of the scorpion,” a reference to the stars of…
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Watch A Unique ‘Two-Step’ Occultation Of Porrima Tonight

We had an almost-occultation when the moon passed very close to the bright star Regulus three nights ago. Tonight, the dark advancing edge of the half-moon will occult Porrima, also known as γ Virginis, for the eastern half of North America and part of the Caribbean during the early evening hours. At the same time, the moon…
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Our Tiny Moon Hides A Supergiant Star Tonight

How does the moon do it? Only 2,160 miles across, tonight it will cover a supergiant star 75 times the diameter of the sun,  23 times more massive and 165,000 times more luminous. Amazing. The moon does its trick because it’s so close to the Earth, the same way you can raise your thumb and hide…
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Moon Covers Aldebaran Today In Broad Daylight

I apologize for being late in getting this out, but if you have small telescope and and clear skies today, you can spot Aldebaran, the brightest star in Taurus, get covered by the moon in broad daylight. The occultation will be visible across the U.S., parts of Canada, Central America and Europe. The moon’s just…
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