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Contents
Atomic and molecular lines Narrow due to interstellar gas diagram 216 | 102 |
Crater Experimental model of an impact 279 280 281 282 283 | 146 |
Galaxies for fields in intermediate latitudes Numbers of 331 | 211 |
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Common terms and phrases
absorption American appear Astronomical August average beginning binaries bright changes close color comet computed continued curve cycle density derived determined direction distance distribution double earth effect fact fall field FIGURE galactic galaxy give given important indicated interest July known later latitude less light lines longitude magnitude March Mars mass maximum mean measures meteor meteorite method miles month Moon motion move nearly Nebulae Notes Nova object observations Observatory obtained occur October orbits original oxide period photographic planet plates position possible present probably problems published recent record reference region relative reports seems seen Society solar space spectral spectrum stars stellar sun-spot Table taken telescope temperature tion University variable visible visual Wilson