The Astronomy Picture of the Day site offers some of the most beautiful images available on the Internet. The photo for today, Christmas Day, 2007 is both beautiful and inspirational:




Merry Christmas to all, especially to our troops stationed around the world who are protecting our cherished freedoms.






The caption for the image explains its majesty:
Welcome to The World At Night. Sharing the night sky seen around the world, this view from Monument Valley, USA includes a picturesque foreground of famous buttes. Buttes are composed of hard volcanic rock left behind after water eroded away the surrounding soft rock. The two buttes on the image left are known as the Mittens, while Merrick Butte is on the right. Recorded just last week, planet Mars is at the left of the skyscape, a glowing beacon of orange that is the brightest object in the frame. To the right of Mars lies the constellation of Orion. Betelgeuse is the reddish star near the center and the Belt of Orion and the Orion Nebula are farther right. Finally, the bright blue star Rigel appears above Merrick Butte in this stunning view of The World At Night.

In ADAMANT: Another Day, Another Cosmology, Russell Seitz writes "Astrophysicists Liang Gao and Tom Theuns have floated an alternative to the theory of primordial matter condensing into star-forming clouds withing clumps of cold dark matter that does not interact with radiation. In their computer model, dark matter can emit radiation,and radiation pressure would resist clumping forces and cause elongation of dark matter concentrations instead."

"Their paper in Science suggests such warm dark matter would stretch out into million solar mass filaments kiloparsecs long , attracting primordial hydrogen and helium gas to form the first stars and nucleate supermassive black holes in galactic centers."

Very interesting, and worth a read.