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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The gas in the outer region of the Andromeda galaxy is found to be orbiting the galaxy with a velocity of 250 km/s. The gas is at a distance of 35 kpc from the center of the galaxy. The total mass of the galaxy is _______ solar masses.
A galaxy at redshift z has an infrared luminosity of LIR. What is the approximate star formation rate of the galaxy? Express your answer in solar masses per year, rounding to the nearest integer. Values: z = 0.3 LIR = 15.9 × 1 0 37 ×10 37 W
5) A black hole in the center of a nearby Galaxy has a Schwarzchild radius of 2.0*10^7 km. How many times more massive than Sagittarius A* (~4*10^6 solar masses) is said black hole ?
What evidence has been found that suggests a black hole at the center of our galaxy?
In the reading, you were told that there were roughly 10,000 galaxies in the image of the Hubble Ultra Deep Field alone. The image is roughly 10 square arcminutes and there are roughly 1.5*10^8 square arcminutes composing the entire sky. With that in mind and assuming that the Hubble Ultra Deep Field represents an average part of the sky, roughly how many galaxies may exist in the observable universe? (Please include commas for every factor of 1,000; for example 2,343,567,890)
what evidence is there that galaxies collide and merge?
If a galaxy contains a supernova that at its brightest has an apparent magnitude of +25, how far away is the galaxy? Assume that the absolute magnitude of the supernova is -14. (Hint: use the magnitude - distance formula : d = 10 (Mv-Mv +5)/5 _______ Mpc
Most of the dark matter in a galaxy is located in the ________ which allows the more luminous matter to rotate around the center of the galaxy at a faster speed than predicted by Kepler's 3rd Law.
How many neutron stars are estimated to be in the Milky Way galaxy? 10 2000 30,000 100 million 100 billion
The Hubble Law, equation (D), can be used to determine the age of the universe. Using your average valueof H, calculate the recessional velocity of a galaxy of a galaxy which is 800 Mpc away.Velocity of a galaxy 800 Mpc away: _______________________________km/sec
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…
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