16:58 — Week 16: Steelers at Packers Game Highlights 2013
01:09 — Find out what most physicists believe caused the "bang" when the universe came into being.
00:58 — Astrophysicist Alex Filippenko explores whether antimatter can naturally occur in the universe and explains what exactly a positron is.
02:40 — Learn why constellations are named after Greek mythological figures and how you can spot these constellations at night.
03:21 — Find out why a meteorite became the most important rock in the search for extraterrestrial life.
02:53 — The Milky Way galaxy consists of 100 to 300 billion stars and is made up of three main parts, the disk, the halo, and the galactic bulge.
01:06 — Is it possible for the universe to expand faster than the speed of light, or would that violate Einstein's Theory of Relativity?
02:34 — The Shoemaker-Levy asteroid impact on Jupiter in 1994 struck with the force of 6 million megatons of TNT.
01:05 — The universe is approximately 14 billion years old, but how have scientists determined this number? Astrophysicist Alex Filippenko fills us in.
01:02 — Are heavy chemical elements produced by star explosions? If so, how do we know this?
02:51 — Astronomers have found an asteroid that could impact earth in the year 2036.
03:17 — Solar flares on the sun's surface can catastrophically damage the earth's electrical infrastructure.
03:36 — Ancient astronomers developed sophisticated tools to predict solar eclipses.
03:23 — Our corner of the Milky Way galaxy is in an ideal area to sustain life.