4₁If a very distant galaxy looks overall "blue" to astronomers, from this they can conclude that:O the galaxy must not be especially massive when compared to most galaxiesF3the galaxy must be composed mostly of very old starsO the galaxy is moving toward us at great speedthe galaxy must have had a personal tragedy of some sort and needs a lot of love$Q SearchDII%F5the galaxy must have a lot of young stars and thus active star formation must still be going in itAproF6ASSleasPereiTUTUSTEWe kelelell*F7&c0PrtScnPHomeEnd

A region with many young stars appears blue in color. High-mass stars live fast and die young, using…

If a very distant galaxy looks overall "blue" to astronomers, from this they can conclude that: O the galaxy must not be especially massive when compared to most galaxies O the galaxy must be composed mostly of very old stars O the galaxy is moving toward us at great speed O the galaxy must have had a personal tragedy of some sort and needs a lot of love O the galaxy must have a lot of young stars and thus active star formation must still be going in it

If a very distant galaxy looks overall "blue" to astronomers, from this they can conclude that: O the galaxy must not be especially massive when compared to most galaxies O the galaxy must be composed mostly of very old stars O the galaxy is moving toward us at great speed O the galaxy must have had a personal tragedy of some sort and needs a lot of love O the galaxy must have a lot of young stars and thus active star formation must still be going in it

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Please solve page 3 and 4 using the table below NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) 1904 227 -30 13 1 1 6402 21 15 9 9 4590 300 36 10 8 6626 8 -6 6 6 5024 333 80 18 3 6637 2 -10 9 9 5272 42 79 10 2 6656 10 -8 3 3 5904 4 47 7 5 6681 3 -12 9 39 6093 353 20 10 9 6356 7 10 15 15 6121 351 16 2 2 6284 358 10 15 15 6171 3 23 6 5 6838 57 -5 4 4 6205 59 41 8 6 6864 20 -26 21 19 6218 16 26 5 5 6981 35 -33 17 14 6254 15 23 4 4 7078 65 -27 10 9 6266 354 7 7 7 7089 53 -36 12 10 6273 357 9 9 9 7099 27 -47 8 5…
Figure 2 shows the "rotation curve" of NGC 2742. It plots the “radial velocity (V)" (how fast material is moving either toward or away from us) that is measured for objects at different distances (R = radius") from the center of the galaxy. The center of the galaxy is at 0 kpc (kiloparsecs) with a speed of 9 km/sec away from us. (These velocities have been corrected for the observed tilt of the galaxy and represent true orbital velocities of the stars and gas.) 200 100 U4779 -100 As you can see, one side of the galaxy is moving with a negative velocity (spinning toward us), while the other side has a positive velocity (spinning away from us). Using Newton's gravity equation, we will be able to determine the gravitational mass of the entire galaxy and how the mass varies versus distance from the galaxy's center. -200 -8 8 -4 Radius (kpc) Read the following text carefully and follow the instructions: Select five radii spaced evenly from 0-10 kpc across the galaxy. Your selections should…
If Hubble’s constant is taken to be 70 ??? ???, and a quasar is found to have a radial velocity equal to 95% of the speed of light, how far is the quasar in Mpc? (Hint: Use Hubble’s Law and solve for the distance; and the speed of light in vacuum is: ?=3.0×105 ??/?).