Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 14, Problem 6P
To determine
The new value of Hubble’s constant.
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why is it difficult to measure the Hubble constant?
Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe. Use the value of H0 = 0.07×103 kms-1/Mpc to estimate the Universe’s age. Comment on the significance of your answer.
What is Hubble constant?
Chapter 14 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 14 - How does the darkness of the night sky tell you...Ch. 14 - How can Earth be located at the center of the...Ch. 14 - Prob. 3RQCh. 14 - Prob. 4RQCh. 14 - Why couldn’t atomic nuclei exist when the e of the...Ch. 14 - Why are measurements of the present density of the...Ch. 14 - Prob. 7RQCh. 14 - Prob. 8RQCh. 14 - What is the evidence that the Universe was very...Ch. 14 - Prob. 10RQ
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- Sketch a caricature or diagram of the situation or phenomenon showing that Hubble’s Law strongly implies an expanding universe. And provide an explanation.arrow_forwardIn the Benchmark Model, what is the total mass of all the matter within the current Hubble Radius (Length)? Values: Assume H0=70 km/s/Mpc Ωm,0=0.3 Your answer must be in units of Solar Masses and in scientific notation and include one decimal place (2 sig figs).arrow_forwardWhat is the total energy of all the radiation in the current Hubble Radius? H0 = 70 km/s/Mps omega(radation) 0 = 9.0 x 10^-5arrow_forward
- Describe how Hubble measured distance and velocity.arrow_forwardThere is still some uncertainty in the Hubble constant. Current estimates range from about 19.9 km/s per million light years to 23 km/s per million light-years. Assume that the Hubble constant has been constant since the Big Bang.arrow_forwardA certain galaxy is observed to be receding from the Sun at a rate of 8000 km/sec. The distance to this Galaxy is measured independently and found to be 1.4 x 10 to the eighth power pc. Using this data, what is the value of the Hubble constant ?arrow_forward
- Gaia will have greatly improved precision over the measurements of Hipparcos. The average uncertainty for most Gaia parallaxes will be about 50 microarcsec, or 0.00005 arcsec. How many times better than Hipparcos (see Exercise 19.32) is this precision?arrow_forwardSuppose you were Hubble and Humason, working on the distances and Doppler shifts of the galaxies. What sorts of things would you have to do to convince yourself (and others) that the relationship you were seeing between the two quantities was a real feature of the behavior of the universe? (For example, would data from two galaxies be enough to demonstrate Hubble’s law? Would data from just the nearest galaxies-in what astronomers call “the Local Group”-suffice?)arrow_forwardWhy can we not determine distances to galaxies by the same method used to measure the parallaxes of stars?arrow_forward
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