UNIVERSE (LOOSELEAF):STARS+GALAXIES
6th Edition
ISBN: 9781319115043
Author: Freedman
Publisher: MAC HIGHER
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Chapter 27, Problem 13Q
To determine
The evidence that microbes in the cracks of rocks could survive a trip to another body in the solar system.
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1) How massive would Earth had been if it had accreted hydrogen compounds in addition to the sme properties listed in table 7.1? (Assume the same properties of the ingredients as listed in the table)
2) Now imagine that Earth had been able to capture hydrogen and helium gas in the same proportions as listed in the table. How massive would it have been?
If you detected radio signals with an average wavelength of 68 cm and suspected that they came from a civilization on a distant Earth-like exoplanet, roughly how much of a change in wavelength (in cm) should you expect to detect as a result of the orbital motion of the distant exoplanet? (Hint: Use the Doppler shift formula.) (Note: Earth's orbital velocity is 30 km/s.)
is it possible to live in other planets?
Chapter 27 Solutions
UNIVERSE (LOOSELEAF):STARS+GALAXIES
Ch. 27 - Prob. 1QCh. 27 - Prob. 2QCh. 27 - Prob. 3QCh. 27 - Prob. 4QCh. 27 - Prob. 5QCh. 27 - Prob. 6QCh. 27 - Prob. 7QCh. 27 - Prob. 8QCh. 27 - Prob. 9QCh. 27 - Prob. 10Q
Ch. 27 - Prob. 11QCh. 27 - Prob. 12QCh. 27 - Prob. 13QCh. 27 - Prob. 14QCh. 27 - Prob. 15QCh. 27 - Prob. 16QCh. 27 - Prob. 17QCh. 27 - Prob. 18QCh. 27 - Prob. 19QCh. 27 - Prob. 20QCh. 27 - Prob. 21QCh. 27 - Prob. 22QCh. 27 - Prob. 23QCh. 27 - Prob. 24QCh. 27 - Prob. 25QCh. 27 - Prob. 26QCh. 27 - Prob. 27QCh. 27 - Prob. 28QCh. 27 - Prob. 29QCh. 27 - Prob. 30QCh. 27 - Prob. 31QCh. 27 - Prob. 32QCh. 27 - Prob. 33Q
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- What is a biomarker? Give some possible examples of biomarkers we might look for beyond the solar system.arrow_forwardWhat evidence do scientists have that life on Earth began in the sea?arrow_forwardThe evidence is overwhelming that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado River and that river's tributary streams. Does this evidence support a catastrophic theory or an evolutionary theory?arrow_forward
- Why is the simultaneous detection of methane and oxygen in an atmosphere a good indication of the existence of a biosphere on that planet?arrow_forwardHow Do We know? The evidence is overwhelming in support of the idea that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado River and its tributary streams. Is that a catastrophic theory or an evolutionary theory?arrow_forwardWhy are scientists confident Earth has never been visited by aliens?arrow_forward
- If you detected radio signals with an average wavelength of 37 cm and suspected that they came from a civilization on a distant Earth-like exoplanet, roughly how much of a change in wavelength (in cm) should you expect to detect as a result of the orbital motion of the distant exoplanet? (Hint: Use the Doppler shift formula.) (Note: Earth's orbital velocity is 30 km/s.) cmarrow_forwardSuppose that Earth grew to its present size in 11 million years from particles averaging 190 g each. On average, how many particles did Earth capture per second? (Notes: 1 yr = 3.2 ✕ 107 s.)arrow_forwardAstronomers believe that the deposit of lava in the giant mare basins did not happen in one flow but in many different eruptions spanning some time. Indeed, in any one mare, we find a variety of rock ages, typically spanning about 100 million years. The individual lava flows as seen in Hadley Rille by the Apollo 15 astronauts were about 4mthick. Estimate the average time interval between the beginnings of successive lava flows if the total depth of the lava in the mare is 2 km.arrow_forward
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