Question

If a galaxy is 2000 Mpc away, what is its recession speed due to the expansion...

If a galaxy is 2000 Mpc away, what is its recession speed due to the expansion of the Universe?
Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

By Hubble's law,

Recession velocity (v) =  H    d

{ where, v = recession velocity [km/s]
d = distance [Mpc] =2000 Mpc   H = Hubble's constant [km/s/Mpc]

The value of Hubble's constant is :  H ~ 70 km/s/Mpc,

So ,

V = 70 km/s/Mpc    2000 Mpc

V = 140000 km/s.

hence, the Recession velocity is :

" KINDLY RATE THE ANSWER " :)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
What is the recession speed for a galaxy cluster 100Mpc away from us? Is the light...
What is the recession speed for a galaxy cluster 100Mpc away from us? Is the light from that galaxy red-shifted or blue shifted?
8. a) Let’s say one galaxy is 4 Mpc away from us and another is 16...
8. a) Let’s say one galaxy is 4 Mpc away from us and another is 16 Mpc away. If the nearer one moves 1 Mpc, how far will the more distant galaxy move in the same amount of time? b) How far away will each of the galaxies in part A be after that amount of time has passed? 9. How would a higher value for the Hubble constant affect the calculation of the age of the universe? A lower...
Use the Hubble Law for the expansion of the Universe (Destination 16) to answer the following...
Use the Hubble Law for the expansion of the Universe (Destination 16) to answer the following questions. a) What is the distance to a galaxy with a recession velocity of 8,000 km/s for an assumed Hubble constant of 62 km/s/Mpc? b) You measure the distance to a galaxy to be 64 Mpc and its recession velocity is 7,800 km/s. What Hubble constant would you derive from this galaxy? c) What is the distance to a galaxy for which you measure...
Galaxy B moves away from galaxy A at 0.501 times the speed of light. Galaxy C...
Galaxy B moves away from galaxy A at 0.501 times the speed of light. Galaxy C moves away from galaxy B in the same direction at 0.783 times the speed of light. How fast does galaxy C recede from galaxy A? Express your answer as a fraction of the speed of light.
A large elliptical galaxy at the center of a cluster of galaxies is located at a...
A large elliptical galaxy at the center of a cluster of galaxies is located at a distance of 400 Mpc from us. a. Calculate the velocity (in km/s) at which the galaxy recedes from us if its motion is completely due to the expansion of the universe as expressed by the Hubble Law. (3 points) b. Calculate how many years the light has traveled from the galaxy to reach us. [Hint: this is the same as the distance measured in...
Consider a galaxy cluster of physical (visible) size 1.0 Mpc. What angle would this galaxy cluster...
Consider a galaxy cluster of physical (visible) size 1.0 Mpc. What angle would this galaxy cluster subtend if situated at redshift 1.0? Redshift 5.0? Do the calculation in a matter-dominated flat universe. Express your answer in arcminutes, where 1 arcminute = (pi/180)*(1/60) radians.
Consider a spiral galaxy that is moving directly away from Earth with a speed V =...
Consider a spiral galaxy that is moving directly away from Earth with a speed V = 3.040×105 m/s at its center, as shown in the figure(Figure 1). The galaxy is also rotating about its center, so that points in its spiral arms are moving with a speed v = 6.650×105 m/s relative to the center. If light with a frequency of 8.213×1014 Hz is emitted in both arms of the galaxy, what frequency is detected by astronomers observing the arm...
Another nearby galaxy to the Milky Way is the Large Magellanic Cloud (LMC). It has a...
Another nearby galaxy to the Milky Way is the Large Magellanic Cloud (LMC). It has a recessional velocity of 278 km/s. If this motion is due to the expansion of the universe, how far away is the Large Magellanic Cloud? Does this make sense given what you know about the distance to Andromeda and the fact that the LMC is the closest galaxy to the Milky Way?
Show all calculations and formulas used. The closest star to earth is 4.253 light years away....
Show all calculations and formulas used. The closest star to earth is 4.253 light years away. How far is that in miles? The fastest space probe ever designed has a speed of about 58,000 km/h. How long would it take it to cross the length of the milky way galaxy? If the parallax angle of a star is 0.000075% then how far away is that star? What is the relative brightness of the Sun as seen from Saturn as compared...
A galaxy is observed to have its H alpha line shifted from the rest value of...
A galaxy is observed to have its H alpha line shifted from the rest value of 656.3 nm to 679 nm. Using H0 = 70 km/s/Mpc, what angle does the galaxy subtend on the sky if its true diameter is 53 kpc? Answer in arcseconds.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT