Más contenido relacionado La actualidad más candente (20) Más de Dale Robert B. Caoili (20) Ast161art1. Looking South from Syene Egypt Latitude: 24º N Scorpius Looking South from Athens Greece Latitude: 38º N Scorpius 12. SCP NCP CEq Z Below the Horizon N S E W Visible Half of the Sky 14. N S W E Z NCP Equator Z NCP N S W E 40º N Latitude Z NCP North Pole 15. Zenith W E S N NCP CEq Never Sets Above Horizon for 12 h Above Horizon for > 12 h Above Horizon for < 12 h Never Rises 18. SCP NCP CEq Winter Solstice Summer Solstice Ecliptic 19. SCP NCP CEq Winter Solstice Summer Solstice Vernal Equinox Autumnal Equinox Ecliptic 20. W E S N NCP Summer Solstice Vernal & Autumnal Equinoxes Winter Solstice Z CEq 21. W E S N NCP CEq Summer Solstice Vernal & Autumnal Equinoxes Winter Solstice Z 27. 2000 Dec 21: Winter Solstice 2001 June 21: Summer Solstice 2001 Mar 20: Vernal Equinox 2001 Sept 22: Autumnal Equinox Winter Summer Summer Winter Spring Autumn Autumn Spring 31. New Moon Full Moon Waning Crescent Last Quarter Waning Gibbous Waxing Gibbous Waxing Crescent First Quarter 35. Sidereal vs. Synodic Months New Moon T=0 d T=27.3 d (Sidereal) T=29.5 d (Synodic) 40. SCP NCP CEq Ecliptic 4th 1st 2nd 3rd Cross-Quarter Days Winter Solstice Summer Solstice Vernal Equinox Autumnal Equinox 41. Solar & Sidereal Days T=0 h Not to Scale Noon T=23 h 56 m 04 s (Sidereal Day) T=24 h (Solar day) Noon 47. Saturn & Jupiter 4/1999 - 6/2000 Saturn Jupiter Mars 11/1998-10/1999 Venus 6-11/1999 Mercury 10-12/1999 48. SCP NCP Celestial Sphere (Daily E-W Motion) Ecliptic Sphere (Annual W-E Motion 23.5º tilt) Planetary Spheres (Retrograde Motions) 56. F 1 F 2 Semimajor Axis Center 57. T=0 d Equal Areas in Equal Times T=10 d T=0 d T=10 d 58. Jan 10 Jan 11 Jan 12 Jan 13 Jan 19 Jan 18 Jan 15 Jan 16 61. Falling Apple : Changing Speed (gets faster as it falls) Same Direction (always falls down) 62. Ball Swung around on a String : Same Speed, (in uniform circular motion) Changing Direction (swinging around the circle) 64. Equal and Opposite Force from the Table Net Force is Zero, No Net Motion Force = (apple’s mass) (acceleration due to gravity) 65. M 1 M 2 d M 1 M 2 2d M 1 M 2 d/2 66. 2M 1 M 2 d M 1 M 2 d 2M 1 2M 2 d 69. Parabola v = v E Hyperbola v>v E Ellipse v C <v<v E Circle v = v C Ellipse v<v C 76. Half-Life = 35 sec T=0 s 0 popped 16 unpopped T=35 s 8 popped 8 unpopped 81. Continuum Source Cloud of Hydrogen Gas Lamp Light Absorbed by Hydrogen Atoms in the Cloud Lamp emits light at all energies 82. Energy Level Diagram of 1 H Continuum n=1 (Ground State) n=3 (2 nd excited state) n=2 (1 st excited state) n=4 n=5 n= 83. Larger Jump = More Energy = Bluer Wavelength n=1 (Ground State) n=3 (2 nd excited state) n=2 (1 st excited state) n=4 n=5 n=3 2 6 2 5 2 4 2 n=6 84. Photons of all other energies (wavelengths) are ignored and pass on by unabsorbed. n=1 (Ground State) n=3 (2 nd excited state) n=2 (1 st excited state) n=4 n=5 n=2 3 2 6 2 5 2 4 n=6 89. 4.5 Billion Years Ago 238 U 206 Pb 235 U 207 Pb 238 U 206 Pb 235 U 207 Pb Today 1 half-life 6.3 half-lives 50% left 1.2% left 90. Seismic Station Lower Mantle Core Upper Mantle Crust Seismic Station P-waves Surface Waves S waves P & S waves Earthquake! 91. Two Faces of the Moon Near Side Far Side Maria Impact Basin Cratered Highlands 97. Interiors of Uranus & Neptune Uranus Neptune Rocky Cores Slushy “ Ice”Mantles Molecular Hydrogen 99. S S P P Star’s spectrum shifts redward Star’s spectrum shifts blueward