Science Behind the News: Extrasolar Planets

submitted by: nsf

Extrasolar planets, or exoplanets, are planets that orbit stars other than our sun. Astronomers like Dr. William Welsh at San Diego State University primarily use two methods to detect these distant planets: Doppler and Transit methods. "Science Behind the News" is produced in partnership with NBC Learn.

Provided by the National Science Foundation & NBC Learn

Science Nation - Super Stars

submitted by: nsf
Who are the biggest super stars in the universe? For Adam Burrows, an astrophysics professor at Princeton University, it's not who, but "what," and they are far from Hollywood, or even earth, for that matter. Burrows would tell you biggest super stars are the stars that die in a massive explosion called a "supernova." With support from the National Science Foundation, Burrows investigates supernovae and he has recently created 3D computer simulations showing the actual moment of a star's...

What Genomes Can Tell Us About the Past by Sydney Brenner - Part 2: (42:36)

submitted by: video_collector

In the second part of talk, I explore other clues that suggest that genomes are not at equilibrium. Some genes appear to be changing more slowly and these older "fossil" genes in modern day genomes may give us insight into the distant past. I also hope to convince you that many of the great mysteries in contemporary biology do not require big research labs but can be solved through "home genomics"- piecing together information through a computer, the internet, and an inquisitive mind.

What Genomes Can Tell Us About the Past by Sydney Brenner - Part 1: (39:06)

submitted by: video_collector
By looking at the light from distant galaxies and having well-established calibration methods, astrophysics can make hypotheses about the history of our universe. Do we have similar "rulers" in biology that could allow us to reconstruct the remote past and the evolution of species on this planet? The answer is likely "yes" and the clues are undoubtedly contained in the many whole genome sequences that are now available for inspection. However, it is critical to evaluate the assumptions that...

Exploring the Moon

submitted by: nasa

Future astronauts return to the lunar surface in this animation. For larger resolution and downloads see: http://www.nasa.gov/multimedia/videogallery/

Space Week: Mars Underground, Part 1

submitted by: scivee-team

Scientists from NASA present cases for and against space missions to Mars and whether it is time for humans to step on the Red Planet.Is man's fate tied to the Red Planet? Scientists debate the future of space exploration.

Space Week: Mars Underground, Part 2

submitted by: scivee-team
A discussion on the advantages of exploring Mars, the Marcian environment, the scientific development brought about by space missions and the significance the planetary research has has on humans and technological development led by Robert Zubrin, President of the Mars Society, Dr. Christopher McKay, a Planetary Scientist, Dr. Louis Friedman, Director of Planetary Society, and Dr. Edwards Weiler, a NASA Space Science Administrator.The president of the Mars Society makes a passionate case for...