Archive for the 'General' Category

Dec10

The 2009 Geminid Meteor Shower

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The Geminid meteor shower has been intensifying in recent years, and researchers say 2009 could be the best year yet. This year’s display peaks on Dec. 13th and 14th.

Dec. 8, 2009: Make hot cocoa. Bundle up. Tell your friends. The best meteor shower of 2009 is about to fall over North America on a long, cold December night.

“It’s the Geminid meteor shower,” says Bill Cooke of NASA’s Meteoroid Environment Office. “and it will peak on Dec. 13th and 14th under ideal viewing conditions.”

A new Moon will keep skies dark for a display that Cooke and others say could top 140 meteors per hour. According to the International Meteor Organization, maximum activity should occur around 12:10 a.m. EST (0510 UT) on Dec. 14th. The peak is broad, however, and the night sky will be rich with Geminids for many hours and perhaps even days around the maximum. [...]

 

Source: Nasa Science – click here for full article





 

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Aug15

In Search of Antimatter Galaxies




Next year, a powerful cosmic ray detector will be installed on the International Space Station. Its mission: to search for antimatter galaxies and other exotic phenomena in the Universe.


Click for large image: An artist's concept of the Alpha Magnetic Spectrometer installed on the International Space Station.

Click for large image: An artist's concept of the Alpha Magnetic Spectrometer installed on the International Space Station.

 

August 14, 2009: NASA’s space shuttle program is winding down. With only about half a dozen more flights, shuttle crews will put the finishing touches on the International Space Station (ISS), bringing to an end twelve years of unprecedented orbital construction. The icon and workhorse of the American space program will have finished its Great Task.

 

An act of Congress in 2008 added another flight to the schedule near the end of the program. Currently scheduled for 2010, this extra flight of the shuttle is going to launch a hunt for antimatter galaxies.

The device that does the actual hunting is called the Alpha Magnetic Spectrometer–or AMS for short. It’s a $1.5 billion cosmic ray detector that the shuttle will deliver to the ISS. [...]

 

 

Source: Nasa Science – click here for full article




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Nov08

Spacetime



 

The universe has at least three spatial and one temporal (time) dimension. It was long thought that the spatial and temporal dimensions were different in nature and independent of one another. However, according to the special theory of relativity, spatial and temporal separations are interconvertible (within limits) by changing one’s motion.

There are now other theories involving the universe having more that the above dimensions. There is disagreement among scientists about such theories. I believe these other theories cannot be tested or proved. So for now Einsteins Special Theory of Relativity explains space time relationships.


Artists concept of general relativity experiment.

High-precision test of general relativity by the Cassini space probe (artist's impression): radio signals sent between the Earth and the probe (green wave) are delayed by the warping of space and time (blue lines) due to the Sun's mass.


Image courtesy of NASA





 

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Nov07

Hello world!

Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!

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