Astronomy: Wallpaper

By Colin Jones

Astronomy is the study of the cosmos. Some treat it as a serious science and others as an enjoyable hobby. That is why, whenever an astronomy picture of the day is offered to the public, people usually jump at the chance. There are plenty of astronomical pictures to choose from, and plenty of interesting celestial objects to keep people enthralled.

NASA of course is a primary source for an astronomy picture of the day. This site NASA.gov shows a new image each and every day. There's also another section that shows video footage. This could be used to create your own image site. Saturn's moon Enceladus was featured on November 5, 2008.

That photo was taken by a passing rocket. It can reproduce details the size of a bus. The ice on this moon reflects as glare, nearly 100% of all the sun light that hits it. So you would need to wear sunglasses! This moon is so unusual that Cassini will continue to fly by for more footage later in its mission.

NASA retains an archive of all the astronomy picture of the day dating all the way back to June 16 of'95. It was a 'what if' footage of the Earth posing as a neutron star. The footage is a computer generation. The most fascinating feature is that the constellation of Orion is visible twice. Even light from behind a neutron star is visible because the dense star bends the light around it. This causes some objects to be seen twice.

The entry for September 8th,'95 was an amazing image of the central part of the 'Milky Way' galaxy taken by NASA's COBE satellite. This area is generally not visible because of the dust hiding it. But COBE scans in infrared, so produced that amazing image of our very symmetrical galaxy.

The astronomy picture of the day was the same on January 1st, 2000 and January 1st, 2001, the reason being because both dates shared this image is that the majority of people considered the year 2000 to be the first year of the third millennium.

However, the third millennium actually commenced on January 1st, 2001. NASA reasoned it was better to just go with both. apod.nasa.gov/apod/ap010101.html depicts man's view of the universe as it progressed from objects orbiting around the Earth all the way to the Big Bang creating the universe as we know it.

NASA has thousands more days with their very own unique astronomy picture of the day. Visit their website, NASA.gov to see them. - 30452

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