Wednesday, September 18, 2019

Sept 18 - Volcano Creates Temporary Pumice Isles

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Satellite image of a pumice raft floating near the Kingdom of Tonga. Image via NASA Earth Observatory.
Volcanic eruption creates enormous floating island of pumice
Last month, rafts of pumice, spewed from an undersea volcano and spanning an area about the size of Washington, D.C., appeared in the South Pacific. Read more.
Are Saturn's rings young or old?
Cassini data suggested that Saturn's rings were only 10 to 100 million years old. A new study suggests that a "ring rain" onto Saturn makes the rings look younger than they really are, and that in fact Saturn's rings date back billions of years. Read more.
How to see the Great Square of Pegasus
It's easy! The Great Square of Pegasus consists of 4 stars of nearly equal brightness in a large square pattern. Once you find it, you can star-hop to other well-known sights in the sky. Read more.
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Tonight … Close-up on Cassiopeia the Queen
The constellation Cassiopeia the Queen has the distinct shape of a W or M. Find her in the north-northeast sky on September and October evenings. Read more.
Learning to live on the moon ... underwater
In this image, taken September 5 in the massive pool at NASA’s Neutral Buoyancy Lab at the Johnson Space Center in Houston, astronaut teams move around, set up habitats, collect samples and deploy experiments as they will on the moon. Image via NASA.
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