Astronomy: The Evolving Universe 9/e
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1 Astronomy: The Evolving Universe 9/e Chapter 1 Key Terms angular diameter angular distance angular speed celestial pole circumpolar stars conjunction constellation eclipse (lunar/solar) ecliptic equinox (spring/fall) geocentric horizon maximum elongation noon opposition phases (moon) planets precession of the equinoxes retrograde motion solar day solstice (summer/winter) zodiac
2 Chapter 2 Key Terms cosmos force forced motion geocentric heliocentric heliocentric stellar parallax natural motion scientific model stellar parallax (heliocentric)
3 Chapter 3 Key Terms aphelion astronomical unit (AU) eccentricity ellipse focus Kepler's laws of planetary motion major axis perihelion semimajor axis sidereal period synodic period
4 Chapter 4 Key Terms acceleration center of mass central force centripetal acceleration centripetal force escape speed free-fall gravitation inertia inverse-square law mass mechanics Newton's laws of motion speed velocity
5 Chapter 5 Key Terms absorption line absorption-line spectrum atom Balmer series Bohr model of the atom conservation of energy continuous spectrum electromagnetic spectrum electron element emission line emission-line spectrum energy energy level excitation flux frequency ground state heat ionization kinetic energy Kirchhoff's rules neutron nucleus photon potential energy proton radiative energy spectral line spectroscope spectroscopy spectrum temperature transition wavelength
6 Chapter 6 Key Terms atmospheric absorption detector eyepiece f-ratio focal length image image processing lens light-gathering power magnifying power objective optics radio interferometer radio telescope refracting telescope refraction reflecting telescope reflection resolution seeing theoretical resolution
7 Chapter 7 Key Terms closed geometry curvature of spacetime expansion of the universe flat (open) geometry general theory of relativity hyperbolic (open) geometry open geometry principle of equivalence spacetime special theory of relativity spherical geometry
8 Chapter 8 Key Terms accretion convection core crust density dynamo model energy evolutionary lifetime greenhouse effect heat magnetic field lines magnetosphere mantle plate tectonics pressure radioactive dating terrestrial planets thermal energy volcanism
9 Chapter 9 Key Terms anorthosites arroyos atmospheric escape basins breccias craters highlands impact cratering lowlands lunar soil mare (pl. maria) mare basalts outgassing polar caps retrograde rotation shield volcano synchronous rotation tidal forces volatiles
10 Chapter 10 Key Terms belts differential rotation Galilean moons Jovian planets metallic hydrogen ring systems ringlets shepherd satellites zones
11 Chapter 11 Key Terms accretion asteroid asteroid belt carbonaceous chondrites chondrites chondrules coma condensation condensation sequence dirty snowball comet model dust tail giant impact model gravitational contraction ion tail irons meteorites meteoroids meteors nebular models nucleus (of a comet) Oort Cloud parent bodies periodic comets planetesimals protoplanets S-, C-, and M-type asteroids solar nebula stones stony-irons volatiles Widmanstätten figures
12 Chapter 12 Key Terms active region blackbody (radiator) carbon - nitrogen - oxygen (CNO) cycle chromosphere conduction convection core (of the sun) corona coronal holes differential rotation dynamo model (solar) flux luminosity neutrino nuclear fusion opacity photosphere Planck curve proton - proton (PP) chain radiation solar flares solar wind Stefan - Boltzmann law sunspots surface temperature Wien's law
13 Chapter 13 Key Terms binary star system giant heliocentric parallax Hertzsprung - Russell diagram inverse-square law for light luminosity class main sequence mass - luminosity relation spectroscopic binary spectroscopic distances stellar lifetimes stellar spectral sequence stellar surface temperatures supergiant white dwarf
14 Chapter 14 Key Terms bipolar outflows bright nebula core-mantle grains coronal interstellar gas dark clouds emission nebula extinction giant molecular clouds H I region H II region interstellar dust interstellar gas interstellar medium nebula pre-main-sequence star protostar reddening reflection nebula T-Tauri stars young stellar objects
15 Chap 15 Key Terms black dwarf cepheid variables degenerate electron gas degenerate gas pressure evolutionary track globular clusters helium flash horizontal branch instability strip main-sequence lifetime nucleosynthesis open clusters periodic (regular) variables planetary nebula Population I stars Population II stars RR Lyrae stars star model thermal pulses triple-alpha reaction turnoff point variable stars zero-age main sequence (ZAMS)
16 Chapter 16 Key Terms accretion disk beta decay black hole Chandrasekhar limit Crab Nebula gamma-ray burster hypernova inverse beta decay lighthouse model millisecond pulsar neutron star polarization pulsar rapid process Roche lobe Schwarzschild radius singularity Sirius B slow process supernova remnant synchrotron radiation Type I supernova Type II supernova white dwarf x-ray bursters
17 Chapter 17 Key Terms dark matter density-wave model disk (of a galaxy) galactic rotation curve halo (of a galaxy) nuclear bulge nucleus (of a galaxy) period - luminosity relationship spiral arm spiral tracers
18 Chapter 18 Key Terms binary galaxies clusters of galaxies Coma cluster elliptical galaxy galactic cannibalism intergalactic medium irregular galaxy Local Group Local Supercluster Magellanic clouds mass - luminosity ratio rotation curve spiral galaxy (normal and barred) starburst galaxies superclusters supergiant elliptical galaxies uniformity of nature voids zone of avoidance
19 Chapter 19 Key Terms active galactic nuclei (AGNs) active galaxies BL Lacertae (BL Lac) objects compact galaxies double quasar extended galaxies gravitational-lens effect head - tail galaxies quasar radio galaxies radio jets relativistic Doppler shift Seyfert galaxies supermassive black hole
20 Chapter 20 Key Terms antimatter Big Bang model cosmic blackbody microwave radiation cosmological principle cosmology flatness problem grand unification theory (GUT) heavy-particle era homogeneous horizon problem inflationary universe model isotropic lepton light-particle era matter era observable universe physical universe primeval fireball quark radiation era recombination strong force supergravity universality of physical laws weak force
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