August 18, 2009 • 45m
Season 4 opens with an exploration of dying stars, the process where stars become supernovas, and, occasionally, become the bigges...Read more
August 25, 2009 • 45m
Without the moon, Earth would be a very different and desolate place today--four hours of sunlight with pitch-black nights, steady...Read more
September 1, 2009 • 45m
Every year, thousands of objects both natural and manmade plummet through our atmosphere and crash into the Earth. These menacing ...Read more
September 8, 2009 • 45m
An examination of the most powerful explosions and blasts in the universe. Includes a look at the Mexico's Yucatán peninsula and t...Read more
September 15, 2009 • 45m
They are breathtaking, lethal and a constant source of surprise. The stunning rings of Saturn have mesmerized countless scientists...Read more
September 22, 2009 • 45m
Experts cook up ways you could destroy the Earth, including swallowing it with a black hole, blowing it up with anti-matter, hurli...Read more
September 29, 2009 • 45m
They are the one-stop-shopping places for learning all about the nature and variety of stars in the Universe. They're unique, beca...Read more
October 6, 2009 • 45m
Outer space is already an essential part of America's ability to fight wars. Our military depends on satellites for many things, s...Read more
October 20, 2009 • 45m
On alien planets, they rain from the sky as scalding iron. On distant moons, even at hundreds of degrees below zero, they slosh ar...Read more
October 27, 2009 • 45m
They sort of sound like the same phenomenon, but Pulsars and Quasars are very different. Pulsars are tiny--only a few miles across...Read more
November 3, 2009 • 45m
Warp speed, transporters, wormholes and lasers--they are all staples of science fiction books, movies, and TV shows. But the fanta...Read more
November 10, 2009 • 45m
Ours is a universe of energy, from powerful jets ejected from black holes to the raw nuclear fury of our Sun. But, the total amoun...Read more