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Download 11 Astronomy
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Astronomy – Description Solar system -- Sun Solar system -- Mercury •One year = 88 days •One day = 59 days •Too dense •Magnetic field with solid core •Messenger Solar system -- Venus •Morning/evening star •1 year = 224 days •1 day = 243 days •Retrograde •No magnetism •Goddess of beauty Solar system -- Mars •God of war Solar system -- Jupiter •Gas giant •1 year = 11.8 years •1 day = 10 hrs •63 moons –Some retrograde •King of the gods Solar System – Jupiter's moons •Amalthea – produces heat, small moon •Ananke – retrograde •S1999-J1 – retrograde •Io – electric generator in Jupiter's magnetic field Solar system -- Saturn •Gas giant •1 year = 24.5 years •1 day = 10 hr 39 min •Thousands of rings made of millions of particles –City size ring, paper thin •60 moons –Some retrograde Solar system -- Uranus •Gas giant •98 degree inclination –Rolls on its side (north pole facing sun) •Magnetic axis 60 degrees off the rotation –Strong field •Five moons –Six mile cliff on tiny Miranda Solar system -- Neptune •Gas giant •1300 mph winds •Generates heat •Tilted and offset magnetic field •Needs 9 billion years to form evolutionarily •Triton –Large retrograde moon Solar system -- Pluto Stars •100,000,000,000 stars in the Milky Way galaxy •100,000,000,000 galaxies •10,000,000,000,000,000,000,000 stars in universe •at 5 GHz, 212 seconds (60 kyrs) to count Galaxies •spheres of galaxies at 1 million light year spacing •Milky Way within a 100,000 to 1.6 million light years of center Astronomy -- Age of the stars Big Bang •Expanding universe •further stars move faster •everything the same in every direction •no unique center •unbounded universe Young universe Starlight and Time •Expanding universe •Milky Way at Center •Bounded universe •Waters above and waters below •White hole •Time stops at horizon of the white hole •6 days on earth, billions of years out there Carmeli and Hartnett •Space velocity relativity replaces space time releativity •Time on earth traveled more slowly than in the heavens until the end of day 4 Astronomy -- Origins Moon calculations •Capture theory –sun capture –precise speed/angle –melted crust, vaporized oceans •Fission theory –2-3 hrs/day –4500°F earth –separate origins of rocks •Accretion Theory –can’t happen –moon lighter (5.5 g/cc vs. 3.3 g/cc) •Impact theory –rare event –wouldn’t form moon Hunt for planets •Earth cannot be unique •Thus, there must be many earths •Thus, life must evolve on other planets •Thus, life on other planets must be similar to earth •Thus, some may be older and more advance than us Hunt for planets •1022 stars • 1 in a million have earths = 1016 • 1 in a million have life = 1010 •1 in a million have people = 104 = 10,000 alien races •Aliens = # of planets * probability of life Green Bank Formula •N=R*fpneflfifcL •Rate of star formation •fraction with planets •# of planets/star that can sustain life •fraction which evolve life •fraction which evolve intelligent life •fraction which evolve technological civilization •lifetime of technological civilization Hunt for planets •A planet would cause a wobble in a star •That wobble can be seen in the light wave (Doppler like effect) •The size and location can be inferred from the light wobble •Thus planets can be found •So far, most (over 200) are Jupiter-like •2 or 3 Goldilocks planets •No possibility of life Astronomy -- Gospel of the stars Explanation •Satan corrupts, he doesn’t create •Cultures all over the world have the same constellations •The stars do not look like the constellations •Original meaning, corrupted into astrology? Storytelling •Virgo, the Virgin •Libra, the Scales •Scorpio, the Scorpion •Sagittarius, the Demi-god Archer •Capricornius, Half-goat, Half-fish •Aquarius, the Water Pourer •Pisces, the Fishes •Aries, the Ram •Taurus, the Bull •Gemini, the Twins or Man and Woman •Cancer, the Crab (enclosure) •Leo, the Lion
