#solar minimum

[cosmicfunnies]

Happy Wednesday!

Here’s “Meet the Sun” revisited comic!

[wayti-blog]

Aurora records reveal shortened solar cycle during Maunder minimum

"Sunspots change in number depending on how much magnetic activity the solar dynamo generates. But there's not total chaos: These changes occur in a cycle, which lasts about 11 years on average. The sun also experiences extended periods of low activity that can last for decades, called grand minima. The Maunder minimum, which occurred between 1645 and 1715, is often viewed as an archetypal example of the sun's behavior during these abnormal periods.

Historical data on the sun's behavior during the Maunder minimum, including records of sunspot activity and radionuclide deposition, are sparse and do not always align. To bolster knowledge of the solar dynamo during the Maunder minimum, Limei Yan and colleagues turned to a new source of data: observations of equatorial aurorae in Korean historical texts.

Korean historians kept meticulous records of events during the Joseon dynasty, which spanned the 14th to 19th centuries. These records include observations of the night sky, such as aurorae, which could be seen regularly during much of the Joseon dynasty because of a geomagnetic anomaly in the west Pacific. Aurorae are correlated with the solar cycle and happen more frequently during periods of high activity."

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[alanfriedman]

The sun at summer solstice 2019... high in the sky and deep in the depths of solar minimum.

[thesurvivalplace]

What Solar Minimum Means and 10 Ways You Need To Prepare For It

What Solar Minimum Means and 10 Ways You Need To Prepare For It

By Jeremiah Johnson – Ready Nutrition

In the article, “Earth’s Big Freeze Looms as Sun Remains Devoid of Sunspots for Most of 2018, the writer addressed an issue that we are perhaps beginning to see the start of right now.

Throughout the United States, you may notice the change in seasons from summer to fall is happening at a much faster rate than normal. The UK Daily Mail published a piece…

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[thefirststarr]

This featured image was captured as a composite from three separate exposures. The setting is a summit of the Austnesfjorden fjord on the Lofoten islands in northern Norway. Although our Sun is nearing Solar Minimum and hence showing relatively little surface activity, holes in the upper corona have provided some nice auroral displays over the last few months.

Image Credit & Copyright: Max Rive

[neemdbss]

The Role of Sunspots and Solar Winds in Climate Change

Do these natural phenomena have a greater impact on climate change than humans and industrialization?

Of course the sun has a greater impact on weather than humans do, even weather modification systems depend upon radiant energy from our nearest star; humans are as significant to the survival of the planet as the dinosaurs were, and it wasn’t overpopulation that killed the dinosaurs, it was natural climate change that did that.

[earthstory]

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nasa Between July 5-11, our Sun-observing satellite, the Solar Dynamics Observatory, saw a sunspot rotate into view and captured it on this. Such sunspots are a common, but are less frequent as we head toward solar minimum, which is the period of low solar activity during its regular approximately 11-year cycle. This sunspot is the first to appear after the sun was spotless for two days, and it is the only sunspot group at this moment. Like freckles on the face of the sun, they appear to be small features, but size is relative: The dark core of this sunspot is actually larger than Earth. Credits: NASA’s Goddard Space Flight Center/SDO/Joy Ng, producer 

[neemdbss]

High up in the clear blue noontime sky, the sun appears to be much the same day-in, day-out, year after year. But astronomers have long known that this is not true. The sun does change. Properly-filtered telescopes reveal a fiery disk often speckled with dark sunspots. Sunspots are strongly magnetized, and they crackle with solar flares—magnetic explosions that illuminate Earth with flashes of X-rays and extreme ultraviolet radiation. The sun is a seething mass of activity.