The Perseus-pices supercluster of galaxies is 64 Mpc from Earth. How long (in years) does it take light from the supercluster to reach Earth?

If Hubble’s constant is taken to be 70 km/sec/Mpc, and a quasar is found with a radial velocity of 0.95 times the speed of light (3 × 10 5 km/s), how far away is the quasar?   a. 4100 Mpc   b. 0.014 Mpc   c. 67 Mpc   d. 74 Mpc   e. 300,000 Mpc

A scientist, using a telescope, sees arcs of light around a galaxy. In 3–5 sentences, explain the cause of the arcs of light.

The galaxy picture below would best be classified as: O Elliptical galaxy O Spiral Galaxy O Irregular Galaxy

If a galaxy is 8.8 Mpc away from Earth and recedes at 498 km/s, what is H0 (in km/s/Mpc)? _______ km/s/Mpc What is the Hubble time (in yr)? _______ yr How would acceleration change your answer? A: If the expansion of the Universe has been accelerating, the Universe could be substantially younger than the value entered above. B: If the expansion of the Universe has been accelerating, the Universe could be substantially older than the value entered above.

According to the Hubble law, if Galaxy A is 10 times more distant than Galaxy B, then Galaxy A is   a. receding 10 times faster than Galaxy B.   b. approaching 10 times faster than Galaxy B.   c. receding 100 times faster than Galaxy B.   d. approaching 100 times faster than Galaxy B.

Pretend that galaxies are spaced evenly, 7.0 Mpc apart, and the average mass of a galaxy is 1.0 ✕ 1011 M. What is the average density (in kg/m3) of matter in the universe? (Note: The volume of a sphere is 4/3pieR^3 and the mass of the sun is 2.0 ✕ 1030 kg.) ______ kg/m^3 Which model universe does this density value support? A: open B: flat C: closed

If a planet was located approximately 32 thousand light-years from the center of a galaxy and orbits that center once every 313 million years, how fast is the planet traveling around the galaxy in km/hr? If needed, use 3.0 × 108 m/s for the speed of light.

The lower limit of the mass of the galaxy is   a. 100 solar masses.   b. 100,000 solar masses.   c. 100 million solar masses.   d. 100 billion solar masses.   e. 100 trillion solar masses.

Based on comparison with the Moon, it can be calculated that Andromeda would have to have a diameter of 35,000 km if it were at the same distance from us as the Moon. But it turns out that the distance from Earth to the Andromeda galaxy has been measured to be 6 × 1013 times farther than to the Moon. That's 60 trillion times farther. What is the true diameter of Andromeda, based on these numbers?