What is the speed of a galaxy with z = 0.050



Astronomers determine that a nearby galaxy is moving toward our galaxy at a speed of 723.0 km/s with respect to the Earth. If Earth receives a wavelength λ = 679.1 nm from a particular star in this nearby galaxy, what was the wavelength emitted by the star? (Give your answer to at least three significant figures.)
Assume a typical galaxy in the Coma cluster moves at a speed approximately equal to the cluster’s velocity dispersion, 977 km s−1 , and the diameter of the Coma cluster is 6 Mpc. a) [5 pts] Estimate how long a galaxy in the Coma cluster would take to travel from one side to the other. b) [2 pts] How does this compare to the present-day Hubble time, tH? c) [3 pts] If there are 1000 galaxies in the Coma cluster,...
(R1 2.4) Suppose the stars in our galaxy have constant orbital speed, v = 220 km s-1, out to the edge of a spherical dark matter halo at distance R 200 kpc. Estimate a "characteristic" time for collapse as tcollR/v. What is the maximum z at which you would expect to see galaxies comparable in R and v to our own galaxy in the concordance model with ?1n at-1-?? 0.3 and h 0.77
A distant galaxy is moving away from Earth at a speed of 70,000 km/s. If a star in that galaxy emits light at a wavelength of 450 nm, what is the wavelength of that light when it reaches Earth? Speed of light c= 300,000 km/s.
The galaxy Palioxis is receding from the Milky Way at a speed of 0.35c. Another galaxy, Euthenia, is receding from the Milky Way in exactly the opposite direction, but at a speed of 0.45c. (a) For an observer in Palioxis, how fast is the Milky Way receding from them? Explain from them? Explain (b) For an observer in Palioxis, how fast is Euthenia receding f Imagine two muons, symbol μ-, moving towards each other with equal and opposite speeds. If...
A galaxy is receding from earth at a velocity of 0.13 c, 13% of the speed of light. What wavelength will be obsered for the first hydrogen Balmer line, with a λ of 656 nm.
If a galaxy is traveling away from us at 2.0 % of the speed of light, roughly how far away is it?
Galaxy A moves away from galaxy B at 0.700 c0 relative to B. A spaceship leaves a planet in galaxy A traveling at 0.550 c0 relative to galaxy A. If the direction in which the ship travels is the same as the direction in which A is moving away from B, what do observers in B measure for the ship's speed?
What is the distance of a galaxy with a recession speed of 320,000 km/sec? (use H = 80 km/sec/Mpc) 4,000 km 25,600,000 Mpc 4,000 Mpc 25,600,000 km
Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×107 light-years from Earth. If the lifetime of a human is taken to be 75.0 years, a spaceship would need to achieve some minimum speed ?min to deliver a living human being to this galaxy. How close to the speed of light would this minimum speed be? Express your answer as the difference between ?min and the speed of light ?. ?−?min= __________ m/s