Far Out -- Measuring the Universe

Far Out -- Measuring the Universe

Yonder to Infinity -- End of the Universe

DVD - 2006
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Far out : "Scaling and measuring the cosmos. How far is a star or a galaxy? Distances are so vast they are described in light years - the distance light travels in a year. Nearby stars are measured by trigonometry - the technique of parallax. Farther out, astronomers used so-called "standard candles". The pulsing and luminosity of Cepheid variable stars works up to about 100-million light years. Then, Type 1a supernovae are the standard candle. Beyond that the "redshift" of galaxies reveals their distances." --Container
Yonder to Infinity : "Rather than slowing down, the expansion of the cosmos seems to be speeding up. The 50-billion galaxies thought to compose the Universe are moving father and farther apart. As energy runs out, the ultimate prospect is cold, dark and lonely. Intriguingly, other universes may exist. But, within our own, we have yet to understand the nature of mysterious dark energy and dark matter - together believed to comprise 96 per cent of the Universe. Astronomy reveals more and more - but we still live in a mystery.
Publisher: Wheeling, IL : Film Ideas, Inc., [distributor] c2006.
Branch Call Number: DVD 520 SCIENCE Far 21-DAY
Characteristics: 1 videodisc :,sd., col. ;,4 3/4 in.


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