2012 March 12 - The Scale of the Universe Interactive. Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang Explanation: What does the universe look like on small scales?
On large scales? Tomorrow's picture: dust before galaxies Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech. Science & Nature - Human Body and Mind - Mind. Physics I: Classical Mechanics - Download free content from MIT. Michio Kaku | Professor of Theoretical Physics, CUNY. Archeology. Life science. Sixty Symbols - Physics and Astronomy videos. Science. The Observer in Physics Double Slit Experiment and Example in Nature. The Particle Adventure.
The Sliding Rocks of Racetrack Playa Mystery. One of the most interesting mysteries of Death Valley National Park is the sliding rocks at Racetrack Playa (a playa is a dry lake bed). These rocks can be found on the floor of the playa with long trails behind them. Somehow these rocks slide across the playa, cutting a furrow in the sediment as they move. Some of these rocks weigh several hundred pounds. That makes the question: "How do they move? " a very challenging one. The truth: No one knows for sure exactly how these rocks move - although a few people have come up with some pretty good explanations. The reason why their movement remains a mystery: No one has ever seen them in motion! Let's learn how they are thought to move.... About Racetrack Playa Racetrack playa is lake bed that is almost perfectly flat and almost always dry.
The climate in this area is arid. Are They Moved by People or Animals? Are They Moved by Wind? This is the favorite explanation. Strong wind gusts are thought to nudge the rocks into motion. Our amazing planet. Science.