The Sun is cooling and shrinking. Scientists have predicted that this was going to happen and in addition they predicted that a little ice age might occur. There was much positing that there were longer solar cycles then just the moderately well understood 11 year cycle. The thought was that the Sun waxed and waned every 300 or 400 years. No one was sure. Then an amazing thing happened. As the solar flares died down the Earth heated up. That was when scientists turned to man and the atmosphere to try to get some answers. The answer appeared to be that all of the GASES (not just co2 but every gas we throw off – there are 20 or more) we dump into the air are heating the planet up. This could lead to climate destabilization. Well the Sun is still quiet. For 2 1/2 years the Sun has been quiet. That is unprecedented in the 150 years at least that we have been observing the solar cycles. For much more on this subject please see one of the best articles I have ever read on the subject.
What’s wrong with the sun?
- 14 June 2010 by Stuart Clark
- Magazine issue 2764. Subscribe and save
- For similar stories, visit the Solar System and Climate Change Topic Guides
Video: Sun spots
SUNSPOTS come and go, but recently they have mostly gone. For centuries, astronomers have recorded when these dark blemishes on the solar surface emerge, only for them to fade away again after a few days, weeks or months. Thanks to their efforts, we know that sunspot numbers ebb and flow in cycles lasting about 11 years.
But for the past two years, the sunspots have mostly been missing. Their absence, the most prolonged for nearly a hundred years, has taken even seasoned sun watchers by surprise. “This is solar behaviour we haven’t seen in living memory,” says David Hathaway, a physicist at NASA’s Marshall Space Flight Center in Huntsville, Alabama.
The sun is under scrutiny as never before thanks to an armada of space telescopes. The results they beam back are portraying our nearest star, and its influence on Earth, in a new light. Sunspots and other clues indicate that the sun’s magnetic activity is diminishing, and that the sun may even be shrinking. Together the results hint that something profound is happening inside the sun. The big question is what?
The stakes have never been higher. Groups of sunspots forewarn of gigantic solar storms that can unleash a billion times more energy than an atomic bomb. Fears that these giant solar eruptions could create havoc on Earth, and disputes over the sun’s role in climate change, are adding urgency to these studies. When NASA and the European Space Agency launched the Solar and Heliospheric Observatory almost 15 years ago, “understanding the solar cycle was not one of its scientific objectives”, says Bernhard Fleck, the mission’s project scientist. “Now it is one of the key questions.”
Sun behaving badly
Sunspots are windows into the sun’s magnetic soul. They form where giant loops of magnetism, generated deep inside the sun, well up and burst through the surface, leading to a localised drop in temperature which we see as a dark patch. Any changes in sunspot numbers reflect changes inside the sun. “During this transition, the sun is giving us a real glimpse into its interior,” says Hathaway.
When sunspot numbers drop at the end of each 11-year cycle, solar storms die down and all becomes much calmer. This “solar minimum” doesn’t last long. Within a year, the spots and storms begin to build towards a new crescendo, the next solar maximum.
What’s special about this latest dip is that the sun is having trouble starting the next solar cycle. The sun began to calm down in late 2007, so no one expected many sunspots in 2008. But computer models predicted that when the spots did return, they would do so in force. Hathaway was reported as thinking the next solar cycle would be a “doozy”: more sunspots, more solar storms and more energy blasted into space. Others predicted that it would be the most active solar cycle on record. The trouble was, no one told the sun.
Please finish the article. It is very long and there is a scholarly debate in the comments section about where the center of the Earth’s gravity is. This is kindofa hoot if you understand it. It is true our jokes are different from other peoples.