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Latest Solar cycle Stories

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2010-08-27 06:50:00

Large changes in the sun's energy output may drive unexpectedly dramatic fluctuations in Earth's outer atmosphere. Results of a study published August 26th link a recent, temporary shrinking of a high atmospheric layer with a sharp drop in the sun's ultraviolet radiation levels. The research, led by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colo., and the University of Colorado at Boulder (CU), indicates that the sun's magnetic cycle, which produces...

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2010-08-26 23:40:03

Large changes in the sun's energy output may drive unexpectedly dramatic fluctuations in Earth's outer atmosphere.Results of a study published today link a recent, temporary shrinking of a high atmospheric layer with a sharp drop in the sun's ultraviolet radiation levels.The research, led by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colo., and the University of Colorado at Boulder (CU), indicates that the sun's magnetic cycle, which produces differing...

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2010-08-26 23:29:27

In a bid to unlock longstanding mysteries of the Sun, including the impacts on Earth of its 11-year cycle, an international team of scientists has successfully probed a distant star. By monitoring the star's sound waves, the team has observed a magnetic cycle analogous to the Sun's solar cycle.The study, conducted by scientists at the National Center for Atmospheric Research (NCAR) and colleagues in France and Spain, is being published this week as a "Brevia" in Science.The scientists studied...

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2010-08-26 09:10:50

Why sunspots are a strong source of radio emissions and what information those emissions carry will be the focus of an invited talk by NJIT Research Professor Jeongwoo Lee tomorrow at the International Astronomical Union Symposium on the Physics of Sun and Star Spots in Ventura, CA. The event numbers among the top gatherings in the U.S. for people studying sunspots and related phenomena. Lee, who will speak today, Aug. 26, 2010, will highlight Owens Valley Solar Array (OVSA), one of the two...

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2010-08-12 20:04:53

A new analysis of the unusually long solar cycle that ended in 2008 suggests that one reason for the long cycle could be a stretching of the Sun's conveyor belt, a current of plasma that circulates between the Sun's equator and its poles. The results should help scientists better understand the factors controlling the timing of solar cycles and could lead to better predictions."¨"¨The study was conducted by Mausumi Dikpati, Peter Gilman, and Giuliana de Toma, all scientists in the...

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2010-07-16 07:10:00

NASA-funded researchers are monitoring a big event in our planet's atmosphere. High above Earth's surface where the atmosphere meets space, a rarefied layer of gas called "the thermosphere" recently collapsed and now is rebounding again. "This is the biggest contraction of the thermosphere in at least 43 years," says John Emmert of the Naval Research Lab, lead author of a paper announcing the finding in the June 19th issue of the Geophysical Research Letters (GRL). "It's a Space Age...

2bb53ca739ff7f8448523132e939ab6e1
2010-03-30 07:25:00

After the most profound lull in solar activity for nearly a century, the Sun is finally coming back to life. But will the solar activity return to previous levels? ESA's venerable solar watchdog SOHO is there, watching and measuring, providing unique information about our nearest star. It was the perfect Christmas present for solar physicists. In mid-December 2009, the largest group of sunspots to emerge for several years manifested itself on the solar surface. It occurred just as some solar...

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2010-03-18 12:25:00

Scientists are learning to predict giant solar storms that could, at any time, hit the Earth and produce cascading catastrophes From Sept. 1 to 2, 1859, the sun blasted out a massive, record-breaking coronal mass ejection (CME)--a huge eruption of highly charged gases and plasma that may have weighed as much as a billion tons. Racing through the solar system at several million miles per hour, the CME eventually collided with the Earth's magnetosphere--an invisible, atmospheric cocoon...

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2010-03-12 13:25:00

Space physicists from the University of Leicester are part of an international team that has identified the impact of the Sun on Mars' atmosphere. Writing in the AGU journal Geophysics Research Letters, the scientists report that Mars is constantly losing part of its atmosphere to space. The new study shows that pressure from solar wind pulses is a significant contributor to Mars's atmospheric escape. The researchers analyzed solar wind data and satellite observations that track the flux of...

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2010-03-12 13:22:22

In today's issue of Science, NASA solar physicist David Hathaway reports that the top of the sun's Great Conveyor Belt has been running at record-high speeds for the past five years. "I believe this could explain the unusually deep solar minimum we've been experiencing," says Hathaway. "The high speed of the conveyor belt challenges existing models of the solar cycle and it has forced us back to the drawing board for new ideas." The Great Conveyor Belt is a massive circulating current of fire...


Latest Solar cycle Reference Libraries

How Solar Cycles Impact Our Weather Here On Earth
2013-01-13 09:10:34

Solar cycles: what are they and why should we care about them? Solar cycles are made up of what are known as solar minimums (min) and solar maximums (max). We refer to a solar min at the time when the sun is not active with many sunspots, while a solar max is just the opposite when we see a large increase in sunspot activity. So how long do solar cycles last? Typically they run on what is known as an 11 year cycle from the max to the min and then start over again anew. As of 2012 we...

4_641fa07d2f22a90aec48fb5581337d772
2004-10-19 04:45:41

Solar Maximum -- The Sun, a roiling ball of plasma, occupies its place in space approximately 93 million miles from Earth. Though it seems simple to inhabitants of this planet -- the Sun shines, giving light and heat -- the processes occurring in the Sun are so complex that many scientists devote their careers to just one aspect of solar activity. Changes in the activity of the Sun particularly engage solar scientists. Whether fluctuations in the solar magnetic field, expulsions of...

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Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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