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Lecture2ASTJan12 - Ducks Fall to Auburn on Last-Second...

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1 Ducks Fall to Auburn on Last-Second Field Goal GLENDALE, Ariz. -- Auburn running back Michael Dyer never heard any whistle, so he just kept running - past the tackler who thought he had him down and deep into Oregon territory. Dyer broke stride then took off on a once-in-a-lifetime run in the final minutes Dyer broke stride, then took off on a once-in-a-lifetime run in the final minutes, setting up a short field goal on the last play that led No. 1 Auburn over the No. 2 Ducks 22-19 in the BCS championship game Monday night. Polaris The North Star SAO 308 GSC 4628:237, HIP 11767, PPM 431, HD 8890, B+88 8 Flamsteed-Bayer: 1-Alpha Ursae Minoris Spectral: F7:Ib-IIv SB **** Data from Hipparcos Catalog **** Proper motion (mas/yr): RA = 44.22, Dec = -11.74 Parallax: 7.560 mas, 132.2751 pc Distance: 431.42 light-years, 27283753.74 astronomical units Magnitude: 1.97 RA: 02h 45m 38.975s Dec: +89°19'00.486" Azm: 359°25'25" Alt: +30°55'41“ (from Tallahassee at 10 pm tonight) Always above horizon. AST1002 Lecture 2 Housekeeping & tour of Blackboard A little bit more about Ch. 0 Astro items in the news. Understanding the news item on the next few slides is required for the course. (Article posted in reading On to the Copernican Revolution. materials). Rocky exoplanet milestone in hunt for Earth-like worlds By Jason Palmer , BBC News Astronomers have discovered the smallest planet outside our Solar System, and the first that is undoubtedly rocky like Earth by Nasa's Kepler team. Measurements of unprecedented precision have shown that the planet, Kepler 10b, has a diameter 1.4 times that of Earth, and a mass 4.6 times higher. However, because it orbits its host star so closely, the planet could not harbour life. The Kepler space telescope, designed to look for the signs of far-flung planets, first spotted the planet 560 light years away alongside hundreds of other first spotted the planet 560 light years away, alongside hundreds of other candidate planets. Kepler relies on the "transiting" technique, which looks for planets that pass between their host star and Earth. A tiny fraction of the star's light is blocked periodically, giving a hint that the star has a planet orbiting it. The radius of the planet correlates to exactly how much light is blocked when it passes. Follow-up measurements by a telescope at the Keck observatory in Hawaii confirmed the find of Kepler 10b by measuring how the planet pulls to and fro on its parent star as it orbits. This cosmic dance causes tiny changes in the colour of the starlight that is measured by telescopes. However, what completed the suite of measurements for the Kepler team was the use of asteroseismology - a study of distant stars that is akin to the study of earthquakes on the Earth. The oscillations that occur within a star - as within the Earth - affect the frequencies of the light that the star emits in a telltale sign of the star's size.
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