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18,387 articles from Guardian Unlimited Science
- title
- Guardian Unlimited Science
- tags
- description
- Articles published by Guardian Unlimited Science
- last updated
- May 18, 2013 (12:02)
- homepage
- http://www.guardian.co.uk/science?gusrc=rss&feed=science
- feed url
- http://www.guardian.co.uk/science/rss
- date added
- September 13, 2007 (14:53)
- meta
- alexa, technorati, rojo
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SATURDAY 18. MAY, 2013
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12:02
Meteor crashes into moon's surface causing flash – video
A Nasa telescope captures the moment a 40kg (88lb) rock crashes into the moon's surface on Friday
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10:01
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10:01
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07:00
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FRIDAY 17. MAY, 2013
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22:30
There is no greater influence on the Earth and its space environment than that of our local star, the Sun. The level of solar activity, as indicated most clearly by the number of sunspots, ebbs and flows over an average cycle of 11 years as does the frequency of solar flares. Such energetic outbursts can blast the Earth with X-rays and UV and drive solar material earthwards to produce aurorae and disrupt communications and satellite systems. Meanwhile, the Earth's atmosphere expands and contracts in phase with the cycle, its resistance affecting the longevity of satellites as they spiral downwards towards re-entry.
The cycle last peaked in March 2000, so we might have expected the next solar maximum in 2011. In fact, the intervening minimum occurred as recently as December 2008 and analysts are anticipating that the maximum will come in the next few months, and it may even be occurring now. They cannot be sure until the long-term average is calculated next year.
As if on cue, a large sunspot that was just emerging around the Sun's E limb unleashed four X-ray flares earlier this week, each of them more powerful than anything seen so far in 2013. That spot is approaching the Sun's central meridian this weekend and should be obvious if we can view the Sun safely. To avoid serious eye damage, though, never look directly at the Sun through binoculars or a telescope. Instead project its image onto a white card or use an approved solar filter.
guardian.co.uk © 2013 Guardian News and Media Limited or its affiliated companies. All rights reserved. | Use of this content is subject to our Terms & Conditions | More Feeds
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17:54
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17:26
Schoolchildren, pensioners and office workers are helping scholars at Oxford University to transcribe 2,000-year-old papyri
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17:14
Nasa's OSIRIS-REx will visit a near-Earth asteroid called Bennu and return with samples that may hold clues to the origins of the solar system and perhaps life itself
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17:06
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17:00
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16:19
Hungry sharks, frogs keen to mate and a mischievous leopard are among the pick of this week's images from the natural world
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15:06
Why, in the age of Richard Dawkins's God Delusion, has one of our leading writers on genetics devoted himself to a book investigating the Bible's scientific credentials? And what explanations can science offer for people who had limbs amputated under the influence of 19th-century mesmerists?
We investigate these and other issues with Steve Jones, the geneticist and science writer, whose latest book, The Serpent's Promise looks at what the Bible has to tell us about food, ageing, and superstition today. Psychology lecturer and one-time professional magician Peter Lamont explains how the secrets of magic can be revealed through an understanding of its historical and social context. Together they describe the science of Lewis Carroll's imagination.
Reading list:
The Serpent's Promise: The Bible Retold as Science by Steve Jones (Little Brown)
Extraordinary Beliefs: A Historical Approach to a Psychological Problem by Peter Lamont (Cambridge University Press)
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13:30
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11:49
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11:38
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10:18
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08:35
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08:00
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02:05
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01:17
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THURSDAY 16. MAY, 2013
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22:00
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20:01
Naposledy aktualizované zdroje
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National Geographic News (dnes, 14:09)
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PhysOrg (dnes, 13:25)
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Yahoo! (dnes, 12:51)
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Technology Review Feed - Tech Review Top Stories (dnes, 06:29)
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EurekAlert (dnes, 06:00)
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BBC Science/Nature (dnes, 03:27)
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ScienceNOW (dnes, 00:23)
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Sci-Tech Today (17. 5, 22:50)
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CBC - Technology & Science News (17. 5, 21:43)
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ScienceDaily (17. 5, 21:24)
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NYT > Science (17. 5, 20:49)
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NASA (17. 5, 02:56)
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Discovery (7. 3, 18:11)
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TIME (27. 7, 08:30)
