Fifteen years ago, a quasar was observed that was found to be located 12 billion light years away. If our universe is approximately 15 billionyears old, when did the quasar emit the light that we observe?A. 3 billion years agoB. 12 billion years agoO C. 15 billion years agoD. 15 years ago

from the question, it is given that- Time taken by light to reach earth: t = 12 billion light years

Answered: Fifteen years ago, a quasar was…

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter29: The Big Bang

Section: Chapter Questions

Problem 29E: There is still some uncertainty in the Hubble constant. (a) Current estimates range from about 19.9...

See similar textbooks

Similar questions

The history of the universe described by the Big Bang theory is separated into different eras. During which era was the predominant temperature of the Universe about 1 million Kelvin?a.The Plank Erab.The GUT Erac.The Electroweak Erad.The Era of Nucleie.The Era of AtomsSome planets have very strong magnetic fields. What features must a planet have to cause this?a.both rapid rotation and a conducting liquid coreb.only a rapid rotationc.only a liquid conducting cored.both a rapid rotation and a solid metallic coree.only a metallic core
The mass density of our universe is measured to be about 10-29 kg/m3. If an arbitrary point is chosen as the center, how large is the radius of a spherical surface centered at the point so that the mass enclosed in the surface will become a blackhole observed by someone outside the surface? A. 4.2 trillion light years B. 420 billion light years C. 42 billion light years D. 4.2 billion light years Is the answer D? Thanks!
If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)? km/s/Mpc What is the Hubble time (in yr)? years How old (in yr) would the universe be, assuming space-time is flat and the expansion of the universe has not been accelerating? 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. BIf the expansion of the Universe has been accelerating, the Universe could be substantially older than the value entered above.
Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case, A. Galaxy 1 must be twice as big as Galaxy 2. B. we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2. C. we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2. D. Galaxy 2 must be twice as old as Galaxy 1.
In the standard model, about when after the Big Bang did the universe become transparent to radiation? O a.10:35 , O b.10435 O C:3x 105 y O d.103 s
Astronomers now think that there is a black hole with more than 4 milliion times the mass of our Sun at the center of our galaxy? Roughly how large would the event horizon of such a supermassive black hole be? a. the size of our moon b. about 4 light years across c. about 17 times the size of our sun d. about the size of an atom (so much mass really compresses the event horizon) e. this question can't be answered without knowing what kind of stars were swallowed by the black hole
1. If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What is the Hubble time (in yr)? 3. How old (in yr) would the universe be, assuming space-time is flat and the expansion of the universe has not been accelerating?
35. Redshift of light from quasar with a “z” value of 3.3 , we are observing quasar as it was_______. 11.7 Billion years ago. 13.2 Billion years ago. 3.3 Billion years ago. 8.2 Billion years ago.
Recall that Hubbleʹs law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubbleʹs constant. Suppose H0 = 80 km/s/Mpc. How fast would a galaxy located 800 megaparsecs distant be receding from us? A. 64 Mpc/s B. 64,000 km/s C. 0.1 times the speed of light D. 10 km/s E. 64 km/s
What value for the Hubble constant would another galaxy in the universe observe? а. the same as observed from Earth O b. the same as other galaxies nearby С. a unique Hubble constant for that specific location in the universe d. a larger Hubble constant, because it is farther away from Earth, and thus observes a more rapid expansion e. A and B, since all galaxies will observe the same Hubble flow, and the same Hubble constant Clear my choice
If you look at quasars with redshifts of 2 or so, you would be looking back to an age of quasars when they were _______________________ they are now. a. just as common as b. twice as common as c. five times as common as d. ten times as common as e. 1,000 times as common as
What happens when galaxies collide? A. Star collisions will be rare but the shapes of the galaxies will be largely distorted. B. The shapes of the galaxies will be largely distorted and many of the stars of one galaxy will collide with stars of the other galaxy. C. The shapes of the galaxies will be distorted and many stars will collide with stars of the other galaxy, as well as with other stars in the same galaxy. D. Star collisions will be rare and the two galaxies will just pass through each other without any changes. Is the answer A? Thank you!

SEE MORE QUESTIONS

Recommended textbooks for you

Astronomy

Physics

ISBN:

9781938168284

Author:

Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:

OpenStax

Astronomy

Physics

ISBN:

9781938168284

Author:

Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:

OpenStax

SEE MORE TEXTBOOKS

Fifteen years ago, a quasar was observed that was found to be located 12 billion light years away. If our universe is approximately 15 billion years old, when did the quasar emit the light that we observe? O A. 3 billion years ago B. 12 billion years ago O C. 15 billion years ago D. 15 years ago