Physics

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In general, ____. a. spiral galaxies are the most common galaxies, and are make up most of the ... Started by cartlidgeashley	3 Replies 97 Views	Jul 27, 2018 by isabelt_18
Cepheid variables are useful in measuring the distance to ____. a. globular clusters and dwarf ... Started by debasdf	1 Replies 89 Views	Jul 27, 2018 by softEldritch
Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____. ... Started by drink	1 Replies 132 Views	Jul 27, 2018 by xiaomengxian
An astronomer would find a type Ia supernova in a distant galaxy useful as a(n) ____. a. spiral ... Started by captainjonesify	1 Replies 128 Views	Jul 27, 2018 by micaelaswann
Cepheids and globular clusters are limited in their ability to measure the distance to galaxies ... Started by Jramos095	3 Replies 83 Views	Jul 27, 2018 by cegalasso
Edwin Hubble and Milton Humason discovered that there was a linear relationship between a galaxy's ... Started by Tazate	1 Replies 92 Views	Jul 27, 2018 by k2629
The Hubble law is one of the most important relations in modern astronomy because it ____. a. ... Started by melina_rosy	1 Replies 226 Views	Jul 27, 2018 by vickyvicksss
Because the Hubble constant equals 70 km/s/Mpc, a galaxy with a recession velocity of 4,900 km/s ... Started by lidoalex	1 Replies 182 Views	Jul 27, 2018 by at
In order to calculate the size and luminosity of a galaxy, you must first determine its ____. a. ... Started by nevelica	3 Replies 157 Views	Jul 27, 2018 by Jmfn03
Compared to other spiral galaxies, the Milky Way is ____. a. comparable to the smallest and ... Started by pane00	1 Replies 102 Views	Jul 27, 2018 by mcomstock09
The range of diameters and luminosities displayed by elliptical galaxies is ____. a. similar to ... Started by rmenurse	1 Replies 74 Views	Jul 27, 2018 by hanadaa
The rotation curve of a galaxy is important in determining the galaxy's ____. a. mass b. age c. ... Started by newbem	1 Replies 81 Views	Jul 27, 2018 by AmberC1996
The ____ depend(s) on the assumption that the mass of a galaxy or galactic cluster is large enough ... Started by fasfsadfdsfa	3 Replies 77 Views	Jul 27, 2018 by peter
Dark matter is detectable in the coronae of ____. a. elliptical galaxies only b. spiral galaxies ... Started by Brittanyd9008	1 Replies 97 Views	Jul 27, 2018 by ASDFGJLO
A key piece of evidence that leads astronomers to conclude that most galaxies include a supermassive ... Started by ec501234	1 Replies 55 Views	Jul 27, 2018 by Expo
A supermassive black hole in the center of a galaxy typically represents ____ of the galaxy's total ... Started by shenderson6	1 Replies 128 Views	Jul 27, 2018 by xoxo123
The mass of visible matter in a galaxy can be estimated by measuring its luminosity. When this is ... Started by ss2343	3 Replies 80 Views	Jul 27, 2018 by ErinKing
The mass of a galaxy's central black hole is related to the mass of the galactic bulge. This implies ... Started by renzo156	1 Replies 89 Views	Jul 27, 2018 by Swizqar
Hot, low-density gas can be detected in galactic clusters through X-ray emission. The gas is ... Started by karateprodigy	1 Replies 45 Views	Jul 27, 2018 by djpooyouma
Gravitational lensing is caused by ____. a. refraction of light through hot intracluster gas b. ... Started by Mollykgkg	1 Replies 111 Views	Jul 27, 2018 by olivia_paige29
Rich galactic clusters ____. a. are rare, because galaxies are usually isolated in space b. ... Started by vicotolentino	3 Replies 87 Views	Jul 27, 2018 by raenoj
Spiral galaxies are mostly found ____. a. in poor clusters where their disk structure will not be ... Started by segrsyd	1 Replies 85 Views	Jul 27, 2018 by stillxalice
Galactic collisions ____. a. are very rare, since few galaxies are in clusters b. will cause ... Started by c0205847	1 Replies 74 Views	Jul 27, 2018 by zenzy
The Milky Way and other spiral galaxies ____. a. must have formed recently, because they contain ... Started by charchew	1 Replies 66 Views	Jul 27, 2018 by bitingbit
Spiral structures and steady star formation depend on ____. a. gentle gravitational interactions ... Started by B	3 Replies 69 Views	Jul 27, 2018 by babybsemail