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Your Age On Other Worlds
Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. This brings up the question of how we define the time intervals we measure. What is a day? What is a year?
NOVA | 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."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. 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.
Planet Hunting, Down to Earth
32 Nearby Stars
A spatial representation of every star within 14 light-years of the Solar System in orthographic projection. There are 32 stars in this region, including the Sun. The stars are colored according to the spectral type, which may not reflect the actual color. Please see this Wikipedia article for the listing of stars.
leo
A perpective spatial representation of the stars that make up the shape of the Leo Constellation when seen from the Solar System. The stars are colored according to the spectral type, which may not reflect the actual color. Please see this Wikipedia article for the listing of stars. Each grid square represents 20 square light years . The grid is aligned to the ecliptic . Planets are not shown on this map because they orbit stars at a relatively small distance.UDF SkyWalker V1.0
Click-drag green circle to pan around the whole image. The Ultra Deep Field obtained by the Hubble Space Telescope is the deepest view into the sky by humankind to date. This image combines 800 frames with a total exposure time of 1 million seconds.
The ABC's of Nuclear Science is a brief introduction to Nuclear Science. We look at Antimatter, Beta rays, Cosmic connection and much more. Visit here and learn about radioactivity - alpha, beta and gamma decay. Find out the difference between fission and fusion.