Solar blowout and a wicked star-planet alignment

Sunspot group 1476 "blemishes" the sun this morning as it rose over Lake Superior in Duluth, Minn. Photo: Bob King

It’s always worth getting up to see a sunrise. Sure, you can’t concentrate and your eyes weigh a pound a piece by afternoon, but it’s worth the lift you feel watching a star rise out of a lake. I saw the sun slowly ease out of Lake Superior in Duluth this morning, and for a few minutes it was safe enough to take pictures with a telephoto lens.

I enjoy imperfections. Matter of fact, I’m built on flaws both inherited and accumulated over the years. Once the solar disk freed itself from the horizon, I could see it also had a blemish, a piece of crud that wouldn’t wipe off. A monster sunspot!

That spot group was plainly visible in the camera once the sun was up. An hour later I easily saw it from home with the naked eye from behind a pair of eclipse glasses.

The sun photograhed this morning through a 3-inch refractor with solar filter later this morning. The big group is 1476; smaller 1477 is at bottom. Photo: Bob King

Now spanning more than 12 Earths, the group is magnificent to view in a small telescope. The main spot has a long string of followers and reminds me of mother goose and her goslings.  Exquisitely small black umbral spots contrasted with the pale, encircling penumbra around the main or lead spot in the group. The photo only hints at the beauty and complexity of the group.

Because the sun rotates on its axis about once every four weeks, we can watch the evolution of this group with each passing day.

In active sunspot groups like 1476, new spots form and evolve quickly. Some expand rapidly and last days or weeks. Others appear and disappear in just a day. Day to day changes are obvious through a small telescope and show us just how dynamic a star can be. As always, you’ll need a safe filter to look directly at the sun. Here’s a link to a recent blog listing good sources.


Must-see video of last night’s M5.7 flare from Region 1476. The best part is the audio. Crank it up!

At 11:18 p.m. Central time last night, sunspot region 1476 blasted off a significant M5-class flare. Though large, it’s not directed toward Earth. For the moment, none of the more powerful X-class flares have made an appearance.

All the activity with more to come is because 1476 is a delta group, where positive and negative magnetic fields (north and south poles) are packed so close together, there’s great potential for instability and the release of energy in the form of solar flares. While there’s only a small chance of auroras for the far north this evening from effects not related to these spots, let’s cross our fingers for possible weekend auroras related to the big group.

From top to bottom: Arcturus, Saturn and Spica form a straight line in the sky last night. Photo: Bob King

Last night when members of our local astronomy club departed the planetarium after the monthly meeting, we instinctively all looked up. Aha! The sky was clear. High up in the southeast was a most striking arrangement: Arcturus, Saturn and Spica all lay in a straight line.

Being humans, we can’t help but be drawn to patterns, and this one you couldn’t miss. Try spying it yourself the next clear night. Go out from 9:30 p.m. on and look well up in the southeastern sky. Arcturus is the bright, orange-red star; below it you’ll find the duo of Saturn and Spica. It’s just cool.

The line will remain straight for about the next several nights. After that, Saturn’s motion to the right (west) will break the pattern. When will you first notice this?

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