43730addgalactic bulge NASA Thesaurus UF 182642 central bulge (galaxies) NASA Thesaurus UF 184717 nuclear bulge (galaxies) NASA Thesaurus RT 43736 galactic nuclei NASA Thesaurus RT 43740 galactic structure NASA Thesaurus RT 61876 galaxies NASA Thesaurus RT 62720 Milky Way Galaxy NASA Thesaurus RT 52692 spiral galaxies NASA Thesaurus RT 55297 x ray sources NASA Thesaurus 43731addgalactic clusters NASA Thesaurus RESTRICTED TO CLUSTERS OF GALAXIES; EXCLUDES OPEN CLUSTERS UF 183534 galaxy groups NASA Thesaurus BT 61022 celestial bodies NASA Thesaurus NT 62525 local group (astronomy) NASA Thesaurus NT 64264 Virgo galactic cluster NASA Thesaurus RT 38096 agglomeration NASA Thesaurus RT 40525 ~ clusters NASA Thesaurus RT 41011 cooling flows (astrophysics) NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 42527 elliptical galaxies NASA Thesaurus RT 64609 large-scale structure of the universe NASA Thesaurus RT 62681 metallicity NASA Thesaurus RT 62736 missing mass (astrophysics) NASA Thesaurus RT 64613 protogalaxies NASA Thesaurus RT 63855 star clusters NASA Thesaurus RT 52804 star distribution NASA Thesaurus RT 63885 stellar systems NASA Thesaurus RT 64494 Sunyaev-Zeldovich effect NASA Thesaurus 61871addGalactic cosmic rays NASA Thesaurus Energetic particles that come from outside the solar system, but generally from within our galaxy-- the Milky Way. BT 61262 cosmic rays NASA Thesaurus BT 43737 galactic radiation NASA Thesaurus RT 64449 Advanced Composition Explorer NASA Thesaurus RT 61619 energetic particles NASA Thesaurus RT 43741 galactic winds NASA Thesaurus RT 52203 solar activity effects NASA Thesaurus RT 63736 solar wind NASA Thesaurus 43733addgalactic evolution NASA Thesaurus UF 183533 galaxy formation NASA Thesaurus BT 42841 evolution (development) NASA Thesaurus RT 60745 astrophysics NASA Thesaurus RT 39318 big bang cosmology NASA Thesaurus RT 41011 cooling flows (astrophysics) NASA Thesaurus RT 41089 cosmology NASA Thesaurus RT 41426 dark matter NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 61873 galactic mass NASA Thesaurus RT 55547 gravitational instability NASA Thesaurus RT 64609 large-scale structure of the universe NASA Thesaurus RT 64613 protogalaxies NASA Thesaurus RT 51130 ring galaxies NASA Thesaurus RT 52804 star distribution NASA Thesaurus RT 63857 star formation rate NASA Thesaurus RT 52876 stellar evolution NASA Thesaurus RT 63881 stellar mass accretion NASA Thesaurus 61872addgalactic halos NASA Thesaurus The tenuous, spherical cloud surrounding spiral galaxies. It is the locus of old stars and globular clusters. Halos appear to be required, at least to some extent, for the stability of disk galaxies. RT 41426 dark matter NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 43740 galactic structure NASA Thesaurus RT 44058 globular clusters NASA Thesaurus RT 44366 halos NASA Thesaurus RT 45462 intergalactic media NASA Thesaurus RT 45528 interstellar gas NASA Thesaurus RT 64447 massive compact halo objects NASA Thesaurus RT 62736 missing mass (astrophysics) NASA Thesaurus RT 62755 molecular clouds NASA Thesaurus RT 64612 Population II stars NASA Thesaurus RT 52692 spiral galaxies NASA Thesaurus RT 52804 star distribution NASA Thesaurus 183530addgalactic magnetic fields NASA Thesaurus USE 45529 interstellar magnetic fields NASA Thesaurus 61873addgalactic mass NASA Thesaurus The total amount of matter contained in a galaxy. BT 62636 mass NASA Thesaurus RT 43733 galactic evolution NASA Thesaurus RT 43740 galactic structure NASA Thesaurus RT 47108 mass distribution NASA Thesaurus RT 52884 stellar mass NASA Thesaurus 43736addgalactic nuclei NASA Thesaurus NT 37949 active galactic nuclei NASA Thesaurus RT 60502 absorption spectra NASA Thesaurus RT 60515 accretion disks NASA Thesaurus RT 37950 active galaxies NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 43730 galactic bulge NASA Thesaurus RT 63355 radio jets (astronomy) NASA Thesaurus RT 63358 radio sources (astronomy) NASA Thesaurus RT 51759 Seyfert galaxies NASA Thesaurus RT 52808 starburst galaxies NASA Thesaurus 43737addgalactic radiation NASA Thesaurus BT 61709 extraterrestrial radiation NASA Thesaurus NT 61871 Galactic cosmic rays NASA Thesaurus NT 61874 galactic radio waves NASA Thesaurus NT 43741 galactic winds NASA Thesaurus RT 37949 active galactic nuclei NASA Thesaurus RT 37950 active galaxies NASA Thesaurus RT 60956 brightness distribution NASA Thesaurus RT 61253 corpuscular radiation NASA Thesaurus RT 61261 cosmic noise NASA Thesaurus RT 61262 cosmic rays NASA Thesaurus RT 41087 cosmic x rays NASA Thesaurus RT 61567 electromagnetic radiation NASA Thesaurus RT 61882 gamma ray astronomy NASA Thesaurus RT 61883 gamma ray bursts NASA Thesaurus RT 55568 gamma ray sources (astronomy) NASA Thesaurus RT 44815 Hubble diagram NASA Thesaurus RT 45302 infrared cirrus (astronomy) NASA Thesaurus RT 45532 interstellar radiation NASA Thesaurus RT 62335 irregular galaxies NASA Thesaurus RT 62640 mass to light ratios NASA Thesaurus RT 48281 nonthermal radiation NASA Thesaurus RT 63336 ~ radiation NASA Thesaurus RT 50518 radiative transfer NASA Thesaurus RT 52268 Solar Radiation 1 satellite NASA Thesaurus RT 52269 Solar Radiation 3 satellite NASA Thesaurus RT 52894 stellar radiation NASA Thesaurus RT 54412 Uhuru satellite NASA Thesaurus 183531addGalactic Radiation Exp Background sats NASA Thesaurus USE 44187 GREB satellites NASA Thesaurus 61874addgalactic radio waves NASA Thesaurus Radio waves emanating from our galaxy. SP-7 1968 BT 42989 extraterrestrial radio waves NASA Thesaurus BT 43737 galactic radiation NASA Thesaurus NT 62865 North Polar Spur (astronomy) NASA Thesaurus RT 61261 cosmic noise NASA Thesaurus RT 63355 radio jets (astronomy) NASA Thesaurus 43739addgalactic rotation NASA Thesaurus BT 63530 rotation NASA Thesaurus RT 41054 corotation NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 44911 hydrogen clouds NASA Thesaurus RT 62335 irregular galaxies NASA Thesaurus RT 52888 stellar motions NASA Thesaurus RT 63885 stellar systems NASA Thesaurus RT 64666 Tully-Fisher relation NASA Thesaurus RT 54709 velocity distribution NASA Thesaurus 43740addgalactic structure NASA Thesaurus RT 60841 barred galaxies NASA Thesaurus RT 40727 compact galaxies NASA Thesaurus RT 41054 corotation NASA Thesaurus RT 41599 density wave model NASA Thesaurus RT 61439 disk galaxies NASA Thesaurus RT 43730 galactic bulge NASA Thesaurus RT 61872 galactic halos NASA Thesaurus RT 61873 galactic mass NASA Thesaurus RT 61876 galaxies NASA Thesaurus RT 45436 interacting galaxies NASA Thesaurus RT 62335 irregular galaxies NASA Thesaurus RT 62736 missing mass (astrophysics) NASA Thesaurus RT 49080 peculiar galaxies NASA Thesaurus RT 51130 ring galaxies NASA Thesaurus RT 51804 shell galaxies NASA Thesaurus RT 63885 stellar systems NASA Thesaurus RT 53080 ~ structures NASA Thesaurus 43741addgalactic winds NASA Thesaurus BT 43737 galactic radiation NASA Thesaurus RT 61871 Galactic cosmic rays NASA Thesaurus RT 63778 space plasmas NASA Thesaurus RT 52901 stellar winds NASA Thesaurus 43742addgalactose NASA Thesaurus BT 44614 hexoses NASA Thesaurus 61875addGalatea NASA Thesaurus A natural satellite of Saturn, orbiting at a mean distance of 62,000 kilometers. NASA BT 47998 Neptune satellites NASA Thesaurus RT 47996 Neptune (planet) NASA Thesaurus 61876addgalaxies NASA Thesaurus Vast assemblages of stars or nebulae, composing island universes separated from other such assemblages by great distances. SP-7 1968 BT 61022 celestial bodies NASA Thesaurus NT 37950 active galaxies NASA Thesaurus NT 40727 compact galaxies NASA Thesaurus NT 61439 disk galaxies NASA Thesaurus NT 61492 dwarf galaxies NASA Thesaurus NT 42527 elliptical galaxies NASA Thesaurus NT 45436 interacting galaxies NASA Thesaurus NT 62335 irregular galaxies NASA Thesaurus NT 46786 Maffei galaxies NASA Thesaurus NT 46792 Magellanic clouds NASA Thesaurus NT 49080 peculiar galaxies NASA Thesaurus NT 64613 protogalaxies NASA Thesaurus NT 51130 ring galaxies NASA Thesaurus NT 51804 shell galaxies NASA Thesaurus NT 52692 spiral galaxies NASA Thesaurus NT 52808 starburst galaxies NASA Thesaurus NT 64264 Virgo galactic cluster NASA Thesaurus RT 60906 BL Lacertae objects NASA Thesaurus RT 43060 faint objects NASA Thesaurus RT 43730 galactic bulge NASA Thesaurus RT 43740 galactic structure NASA Thesaurus RT 44275 Gum nebula NASA Thesaurus RT 62138 Hubble constant NASA Thesaurus RT 44815 Hubble diagram NASA Thesaurus RT 62681 metallicity NASA Thesaurus RT 62817 nebulae NASA Thesaurus RT 62959 Orion nebula NASA Thesaurus RT 50410 quasars NASA Thesaurus RT 63358 radio sources (astronomy) NASA Thesaurus RT 63419 red shift NASA Thesaurus RT 63855 star clusters NASA Thesaurus RT 63857 star formation rate NASA Thesaurus RT 63861 stars NASA Thesaurus RT 63885 stellar systems NASA Thesaurus 183532addGalaxy aircraft NASA Thesaurus USE 39819 C-5 aircraft NASA Thesaurus 183533addgalaxy formation NASA Thesaurus USE 43733 galactic evolution NASA Thesaurus 183534addgalaxy groups NASA Thesaurus USE 43731 galactic clusters NASA Thesaurus 183535addgalaxy interaction NASA Thesaurus USE 45436 interacting galaxies NASA Thesaurus