How would You know Buffalo Bob?? Did You give sun a rectal thermometer reading??
Larry
#2 | Posted by LarryMohr at 2009-04-21 07:24 AM | Reply | Flag
Pay attention Larry--here is how I know. I read. Try it. Then try thinking about what you've read.
"The Sun is the dimmest it has been for nearly a century.
There are no sunspots, very few solar flares - and our nearest star is the quietest it has been for a very long time.
The observations are baffling astronomers, who are due to study new pictures of the Sun, taken from space, at the UK National Astronomy Meeting.
The Sun normally undergoes an 11-year cycle of activity. At its peak, it has a tumultuous boiling atmosphere that spits out flares and planet-sized chunks of super-hot gas. This is followed by a calmer period.
Last year, it was expected that it would have been hotting up after a quiet spell. But instead it hit a 50-year year low in solar wind pressure, a 55-year low in radio emissions, and a 100-year low in sunspot activity.
According to Prof Louise Hara of University College London, it is unclear why this is happening or when the Sun is likely to become more active again.
"There's no sign of us coming out of it yet," she told BBC News.
"At the moment, there are scientific papers coming out suggesting that we'll be going into a normal period of activity soon.
"Others are suggesting we'll be going into another minimum period - this is a big scientific debate at the moment."
In the mid-17th Century, a quiet spell - known as the Maunder Minimum - lasted 70 years, and led to a "mini ice-age".
This has resulted in some people suggesting that a similar cooling might offset the impact of climate change.
According to Prof Mike Lockwood of Southampton University, this view is too simplistic.
"I wish the Sun was coming to our aid but, unfortunately, the data shows that is not the case," he said.
Prof Lockwood was one of the first researchers to show that the Sun's activity has been gradually decreasing since 1985, yet overall global temperatures have continued to rise.
"If you look carefully at the observations, it's pretty clear that the underlying level of the Sun peaked at about 1985 and what we are seeing is a continuation of a downward trend (in solar activity) that's been going on for a couple of decades.
"If the Sun's dimming were to have a cooling effect, we'd have seen it by now."
'Middle ground'
Evidence from tree trunks and ice cores suggest that the Sun is calming down after an unusually high point in its activity.