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 5P
To determine
How the diagram would be changed if the value of the Hubble constant changed to
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Students have asked these similar questions
If the value of the Hubble's constant were found to be 60 km/s/Mpc, what would the Hubble time be?
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.
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.
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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- The best parallaxes obtained with Hipparcos have an accuracy of 0.001 arcsec. If you want to measure the distance to a star with an accuracy of 10%, its parallax must be 10 times larger than the typical error. How far away can you obtain a distance that is accurate to 10% with Hipparcos data? The disk of our Galaxy is 100,000 light-years in diameter. What fraction of the diameter of the Galaxy’s disk is the distance for which we can measure accurate parallaxes?arrow_forwardCalculate the age of the universe if the Hubble constant were 65 km/s/Mpc.arrow_forwardA Type la supernova explodes in a galaxy at a distance of 6.10×107 light-years from Earth. If astronomers detect the light from the supernova today, how many years T have passed since the supernova exploded? T= 2.07 x10 -5 years Given a Hubble constant of 74.3 km/s/Mpc, at what speed v is this galaxy moving away from Earth? v= km/s What is this galaxy's redshift? redshift:arrow_forward
- What is the distance in parsec to pulsar 0628-28 using 400 and 600 MHz frequencies? The dispersion measure is 124.5.arrow_forwardWhat would be the Hubble constant if the universe were 18 billion years old?arrow_forwardCalculate the age of the universe for the following Hubble's constant, (a) 30 km/s/Mpcarrow_forward
- The distance between the Milky Way and Andromeda Galaxy is 2.54 Mly. What is that distance in Mpc? [Hint: 1 pc = 3.26 ly]arrow_forwardWhat is the estimated age of the Universe (in years) if the Hubble constant is 80 km/s/Mpc?arrow_forward1.2 1.0 0.8 0.6 Cosmic background data from COBE 0.4 0.2 0.0 0.5 10 Wavelength A in mm c) Background (CMB) undertaken by the COBE satellite. Use this diagram to estimate the current temperature of the CMB. Based on your estimate, what would the temperature of the CMB have been at a redshift of z = 5000? The left hand diagram above shows the results from observations of the Cosmic Microwave Radiated Intensity per Unit Wavelength (16° Watts/m per mm)arrow_forward
- If a galaxy is 8.9 Mpc away from Earth and recedes at 510 km/s, what is H0 (in km/s/Mpc)?arrow_forwardPretend 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: closedarrow_forwardThe Hubble constant is (approximately) 70 kilometers per second per megaparsec. At approximately how far in the future, will the scale-factor be 1% larger than it is today?arrow_forward
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