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SUNDAY, NOVEMBER 22, 2009
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5

Saturn's Rings Vanish Today

They'll be out of sight for three months

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(Newser) – Saturn's rings will disappear from sight for three months starting today, Space.com reports. The rings, 170,000 miles long but only 30 feet thick, are visible because they reflect sunlight. But they vanish once every 15 years as equinoxes occur in its 30-year orbit and the rings are directly in line with the sun. This equinox marks the arrival of spring to Saturn's northern hemisphere.

"The light reflecting off this extremely narrow band is so small that for all intents and purposes the rings simply vanish," a NASA scientist explained. "Whenever equinox occurs on Saturn, sunlight will hit Saturn's thin rings, the ring plane, edge-on."

Saturn's rings are made up of trillions of tons of ice, dust and rock.
Saturn's rings are made up of trillions of tons of ice, dust and rock.   (AP Photo/NASA/Casini Spcae Craft)
This image provided by NASA captures the transit of several moons across the face of the planet.
This image provided by NASA captures the transit of several moons across the face of the planet.   (AP Photo/NASA)
This view of Saturn was taken by cameras aboard NASA's Cassini spacecraft.
This view of Saturn was taken by cameras aboard NASA's Cassini spacecraft.   (AP Photo/NASA, Jet Propulsion Laboratories)
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Newser001
Aug 11, 09 2:27 AM CDT
Cool... BTW (EarthSky) August 12, 2009 Perseids - And when we say August 12, we mean that morning … not that night. These typically fast and bright meteors radiate from a point in the constellation Perseus, and, like all meteors in annual showers, they cover a large part of the sky. The Perseids are considered by many people to be the year’s best shower when the moon is out of the way during the shower’s peak. Unfortnately, this year’s moon is not totally out of the way during the Perseids. The slightly waning gibbous moon rises around midnight – just as the Perseids start to pick up steam. Nonetheless, you should be able to catch some Perseid meteors before moonrise – and even after . The Perseids tend to strengthen in number as midnight ebbs toward dawn. Although not a favorable year, these meteors are often bright and frequently leave persistent trains. What’s more, enhanced activity may be in the works, so perhaps enough brighter meteors can overcome the moonlit glare to make this year’s production worthwhile. From late night on Tuesday, August 11 till dawn on Wednsday, August 12, a decent sprinkling of Perseid meteors may adorn this summer night, despite the pesky moon. Lie back and watch meteors until dawn’s light washes the stars, moon and planets from the sky. Enjoy! Reply
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Circusdog
Aug 11, 09 8:13 AM CDT
or you can always look at Uranus!
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Reader60610265
Aug 11, 09 8:12 AM CDT
I was wondering , are the rings going to fade slowly like an eclipse or just kind of turn off like a light bulb? Reply
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AClotfelter
Aug 11, 09 12:28 PM CDT
I would imagine it would be pretty quick...
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cognitivefilter
Aug 11, 09 10:51 PM CDT
misleading headline...i totally thought something was going terribly awry in space Reply
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