Wednesday, February 4, 2009

NASA Photos of Speceships
Space ship near astroid
Artist's Concept of Deep Impact's Encounter with Comet Tempel 1
Spaceship near comet
Deep Space 1 Using its Ion Engine (Artist's Concept)
two groups of two stars with dust ring around one pair
Evidence for Strange Stellar Family (Artist Concept)
big antena in orbit around red planet with grey planet in background
New Horizons at Pluto

Full Color Hemispheric View of Venus Centered at 180 Degrees East Longitude

Full color pictures of Venus.

Tuesday, February 3, 2009

The Crown of Tethys

The crater (450 kilometers or 280 miles across) is a remarkably well-preserved example of an ancient multi-ringed impact basin: The outer ring is defined by steep, cliff-like walls that descend to generally broad internal terraces. The inner ring is formed by a prominent, crown-shaped, 140-kilometer (88-mile) diameter circular band of icy mountains. Multi-ring basins are seen on rocky bodies as well as icy ones.

Monday, February 2, 2009

First Sign of Chocolate in Ancient U.S. Found

The residues, found on pottery shards excavated from a large pueblo (called Pueblo Bonito) in Chaco Canyon in northwestern New Mexico, suggest the practice of drinking chocolate had traveled from what is now Mexico to the American Southwest by about 1,000 years ago.

Now, researchers think a similar ritual may have taken place in villages in Chaco Canyon. Patricia Crown of the University of New Mexico and Jeffrey Hurst of the Hershey Center for Health and Nutrition found traces of theobromine, which is in the Theobroma cacao plant that bears beans from which chocolate is made, on the shards. (The Hershey Center was established by the Hershey Company in 2006.)

Since the cacao plant is tropical and can't be grown in New Mexico and other places in the United States, the researchers think the chocolate beans came from Mesoamerica, with the closest source being about 1,240 miles (2,000 km) away from the Chaco site.