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Posts Tagged ‘sunspots

“Sure, black holes can kill us, and in a variety of interesting and gruesome ways. But, all in all, we may owe our very existence to them”*…

 

If you want to see a black hole tonight, just look in the direction of Sagittarius, the constellation. That’s the center of the Milky Way Galaxy and there’s a raging black hole at the very center of that constellation that holds the galaxy together.

– Michio Kaku

So, which came first:  the galaxies spread through the universe, of the black holes that hold them together? Ethan Siegel answers and explains.

* Philip Plait, Death from the Skies!: These Are the Ways the World Will End…

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As we raise our eyes, we might send star-struck birthday greetings to Johann Rudolf Wolf; he was born on this date in 1816.  A distinguished astronomer and mathematician, Wolf wrote on prime number theory, geometry, probability, and statistics; but he is best remembered for his work on sunspots.  Working from Heinrich Schwabe’s suggestion that sunspot activity was cyclical, Wolf calculated the period of the cycle at 11.1 years; he was among the first to establish the connection of sunspot activity to geomagnetic activity on Earth; and he developed a way of quantifying sunspot activity– the Wolf number, as it is known– that remains in use.

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Written by LW

July 7, 2014 at 1:01 am

Beware the Pink Armadillo!…

Blizzards across the U.S. (record snowfalls)… droughts in Russia (worst in a century) and China (likely the worst in 200 years)…  a one-two punch in the Antipodes: a century-worst decade of drought in Australia followed immediately by devastating floods

There’s no question that climate disruption (or “global warming” or whatever one wants to call it) is having real impact: disrupted transit and hammered retail sales in the U.S. (and the U.K.) seem mere inconveniences in the face of drought-driven pressure on global food prices– pressure that’s aggravated the already painful problem of poverty around the world, and that’s surely contributed to the tensions roiling repressive/regressive regimes in the Middle East and elsewhere…  all, scientists suggest, just a taste of the broader and deeper impacts to come if humankind doesn’t heal its relationship with Nature.

And, of course, it is up to us humans.  Nature doesn’t care.  Nature is perfectly prepared to get on with a future sans people.  Memento Mori, Memento Natura…

Thankfully, there are artists to remind us– artists who were, as is so often the case, attuned to the threat even before the scientific establishment.  Consider, for example, Jinzo Ningen Kikaida (a 70s Japanese TV series in the tradition of the great Ishiro Honda), which fielded this crystalline allegory:

Mother Nature’s go-go boots are made for walking– walking all over you.

As we ask not what Copenhagen can do for us, but what we can do for Copenhagen, we might recall that it was on this date in 1611 that Johannes Fabricius discovered sunspots (now reputed to have some impact on global climate); he published his observation on June 13 of that year in  Narratio de Maculis in Sole Observatis et Apparente Earum cum Sole Conversione (“Narration on Spots Observed on the Sun and their Apparent Rotation with the Sun“).

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