Physics

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If the density is less than critical, which fate of the universe awaits us? What will be an ideal ... Started by justinmsk	3 Replies 75 Views	Jul 27, 2018 by Eazy416
Of what is the galactic halo composed? What will be an ideal ... Started by mydiamond	1 Replies 76 Views	Jul 27, 2018 by nital
The gas density in an emission nebula is typically about how many particles per cc? A) dozen B) ... Started by torybrooks	1 Replies 58 Views	Jul 27, 2018 by taylorsonier
How does metal content vary between young disk stars and older halo stars? Why? What will be an ... Started by 09madisonrousseau09	1 Replies 334 Views	Jul 27, 2018 by bitingbit
A large gas cloud in the interstellar medium that contains several type O and B stars would appear ... Started by captainjonesify	3 Replies 96 Views	Jul 27, 2018 by chinwesucks
Compared to Saturn, Jupiter is about A) 100 times more massive. B) twice the diameter, but less ... Started by casperchen82	1 Replies 109 Views	Jul 27, 2018 by maya.nigrin17@yahoo.com
When dark matter was first discovered, some astronomers thought that o was greater than one from the ... Started by 09madisonrousseau09	1 Replies 314 Views	Jul 27, 2018 by emsimon14
Contrast the observed visible mass of the Galaxy with its suspected total. Explain the difference. ... Started by serike	1 Replies 96 Views	Jul 27, 2018 by jgranad15
The most common molecule in a molecular cloud is A) ammonia, NH3. B) molecular hydrogen, H2. C) ... Started by Brittanyd9008	3 Replies 174 Views	Jul 27, 2018 by juliaf
The rotation curve of the outer portions of the Galaxy revealed what about its mass? What will be ... Started by tiara099	1 Replies 93 Views	Jul 27, 2018 by fur
Why are dark dust clouds largely misnamed? A) It is ice, not dust, which make them look dark. B) ... Started by schs14	1 Replies 113 Views	Jul 27, 2018 by cloudre37
Why do we believe a black hole lies toward Sagittarius? What will be an ideal ... Started by big1devin	1 Replies 64 Views	Jul 27, 2018 by zogaridan
What information does 21-cm radiation provide about the gas clouds? A) their motion B) their ... Started by joesmith1212	3 Replies 64 Views	Jul 27, 2018 by amynguyen1221
The two outer jovian planets appear bluish in color because A) methane gas in their atmospheres ... Started by Chelseaamend	1 Replies 128 Views	Jul 27, 2018 by dajones82
Neutral hydrogen atoms are best studied from their energy given off as A) 21-cm waves in the ... Started by rlane42	1 Replies 74 Views	Jul 27, 2018 by janeli1
Contrast the open vs. globular clusters in terms of age, color, galactic distribution, chemical ... Started by go.lag	1 Replies 58 Views	Jul 27, 2018 by xoxo123
The average temperature of the typical dark dust cloud is about A) 0 K. B) 2.73 K. C) 100 K. D) ... Started by mpobi80	3 Replies 98 Views	Jul 27, 2018 by mathjasmine
Compare the way an optical and radio astronomer would map the Galaxy. What will be an ideal ... Started by ap345	1 Replies 40 Views	Jul 27, 2018 by kbennett34
What satellite revealed the most about cosmology, and why was it so effective? What will be an ... Started by TFauchery	1 Replies 38 Views	Jul 27, 2018 by peter
Why did Hubble conclude the universe must be expanding? What will be an ideal ... Started by casperchen82	1 Replies 65 Views	Jul 27, 2018 by mistyjohnson
Of the jovian planets, which generates the least internal heat? A) Pluto B) Jupiter C) Neptune D) ... Started by sabina	3 Replies 96 Views	Jul 27, 2018 by l.stuut
Why are the halo stars distributed spherically instead of throughout the disk? What will be an ... Started by clmills979	1 Replies 47 Views	Jul 27, 2018 by jessofishing
During the T-Tauri phase of a protostar, it A) begins a period of reduced activity. B) expands ... Started by skymedlock	1 Replies 58 Views	Jul 27, 2018 by ynlevi
Describe the cycle of life and death we observe in the spiral arms. What will be an ideal ... Started by NClaborn	1 Replies 62 Views	Jul 27, 2018 by tdewitt
Relate the Galaxy's spiral arms to the spiral-density wave theory. What will be an ideal ... Started by 2125004343	3 Replies 194 Views	Jul 27, 2018 by lindahyatt42