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360.swf (application/x-shockwave-flash Object) Interactive Sky Map. The Frontier Is Everywhere. Into The Universe With Stephen Hawking - The Story Of Everything - 1 of 9. Into The Universe With Stephen Hawking - Time Travel Part 1 of 5. Time Travel: Einstein's big idea (Theory of Relativity) Imagining the Tenth Dimension - Rob Bryanton [FULL CLIP].flv. The Particle Adventure. Time Lapse of Earth from Space.

Your Age On Other Worlds. Looking at the numbers above, you'll immediately notice that you are different ages on the different planets.

Your Age On Other Worlds

This brings up the question of how we define the time intervals we measure. What is a day? What is a year? The earth is in motion. Actually, several different motions all at once. The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods? Kepler briefly worked with the great Danish observational astronomer, Tycho Brahe. Here you see a planet in a very elliptical orbit. Kepler's third law is the one that interests us the most.

Let's just solve for the period by taking the square root of both sides: How Many People Are In Space Right Now? The Elegant Universe: Pt 1. The Elegant Universe: Part 3 PBS Airdate: November 4, 2003 NARRATOR: Now, on NOVA, take a thrill ride into a world stranger than science fiction, where you play the game by breaking some rules, where a new view of the universe pushes you beyond the limits of your wildest imagination.

This is the world of "string theory," a way of describing every force and all matter from an atom to earth, to the end of the galaxies—from the birth of time to its final tick, in a single theory, a "Theory of Everything. " Our guide to this brave new world is Brian Greene, the bestselling author and physicist. BRIAN GREENE (Columbia University): And no matter how many times I come here, I never seem to get used to it. NARRATOR: Can he help us solve the greatest puzzle of modern physics—that our understanding of the universe is based on two sets of laws that don't agree? NARRATOR: Resolving that contradiction eluded even Einstein, who made it his final quest.

S. Stellarium. Chromoscope - View the Universe in different wavelengths. We are listening. Planets. The Size Of Our World. Planet Hunting, Down to Earth. Credit: European Southern Observatory Two teams of researchers are now competing to develop a device that could profoundly change our understanding of the universe…but you’d be forgiven if you mistook it for a vaguely menacing hair-restoration product.

Planet Hunting, Down to Earth

Called a “laser frequency comb,” these are special laser systems that rapidly emit pulses of light across a wide range of frequencies or colors. In a plot of the emitted light, each distinct frequency appears as a peak; collectively, all the frequencies resemble a fine-toothed comb. And by examining starlight through the teeth of a laser comb, astronomers could begin finding Earth-like extrasolar planets on the cheap using ground-based observatories rather than expensive space telescopes. A star’s spectrum, its component colors of light, can reveal whether or not it has planets circling it. Laser combs could change all that by providing a standardized—and exceedingly precise—way of measuring Doppler shifts from stars’ spectra.

My Solar System 2.02. The Mystery Hexagon on SATURN. Asteroid Impact. 32 Nearby Stars. Leo. The Hubble Deep Field: The Most Important Image Ever Taken. UDF SkyWalker V1.0. m78_2400x1600h.jpg (JPEG Image, 2391x1600 pixels) Universcale. A Review of the Universe. The ABC's of Nuclear Science. StumbleVideo - Bill Nye The Science Guy on Outerspace (Full Clip) StumbleVideo - Physics of the Impossible. StumbleVideo - Asteroid Discovery From 1980 - 2010. The Scale of the Universe. Welcome to Cool Cosmos! ElectromagneticSpectrum.png (PNG Image, 775x610 pixels)

StumbleVideo - Most Of Our Universe Is Missing [BBC 2006 - Horizon] Systemesolaire2.jpg (JPEG Image, 30000x1000 pixels)