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18180 |
duddy |
9 years ago |
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Sunlight continues to damage skin even after dark
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Researchers have discovered that sun exposure gives skin cells a postsunshine hangover that lasts for hours. In fact, UV rays damage skin cells for hours after you've stepped out of the sun - and even if you're in complete darkness!
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15525 |
duddy |
9 years ago |
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Stalking the sun
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This image, released by NASA a few days ago, overlays a year's worth of photographs of the Sun, revealing the migration of active regions towards the equator.
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9328 |
duddy |
10 years ago |
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Does it rain in the Sun?
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Physicists have figured out how colossal rainstorms are formed in the Sun's atmosphere, and it's surprisingly similar to how we get our rain. It turns out that plasma rain falls on the sun at 200 000 km/h. Each raindrop is the size of Ireland!
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4640 |
duddy |
10 years ago |
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Have you ever seen the sun like this?
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The Sun, through an H-alpha filter, which captures a narrow band of light containing the frequency of photons emitted when a hydrogen's electron drops from the 3 rd energy level to the 2 nd.
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5044 |
duddy |
10 years ago |
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Earth-rise from the moon
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This is a breathtaking 'earthrise' viewed from the surface of the moon. NASA's Lunar Reconnaissance Orbiter sees the Earth rise 12 times a day but is usually so busy imaging the moon's surface it doesn't get to capture the moment. This colourised image was taken on 1 February 2014.
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2413 |
duddy |
10 years ago |
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Clouds that look like rainbows
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'Fire rainbows', also known as iridescent clouds, are a rare phenomenon that only occur when the Sun is higher than 58° above the horizon and its light passes through cirrus clouds made of ice crystals. At the right alignment, the ice crystals act as a prism, and refract the light to look like a rainbow. ...
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2497 |
duddy |
10 years ago |
