Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 21, Problem 13E
List three ways in which the exoplanets we have detected have been found to be different from planets in our solar system.
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Chapter 21 Solutions
Astronomy
Ch. 21 - Give several reasons the Orion molecular cloud is...Ch. 21 - Why is star formation more likely to occur in cold...Ch. 21 - Why have we learned a lot about star formation...Ch. 21 - Describe what happens when a star forms. Begin...Ch. 21 - Describe how the T Tauri star stage in the life of...Ch. 21 - Look at the four stages shown in Figure 21.8. In...Ch. 21 - The evolutionary track for a star of 1 solar mass...Ch. 21 - Two protostars, one 10 times the mass of the Sun...Ch. 21 - Compare the scale (size) of a typical dusty disk...Ch. 21 - Why is it so hard to see planets around other...
Ch. 21 - Why did it take astronomers until 1995 to discover...Ch. 21 - Which types of planets are most easily detected by...Ch. 21 - List three ways in which the exoplanets we have...Ch. 21 - List any similarities between discovered...Ch. 21 - What revisions to the theory of planet formation...Ch. 21 - Why are young Jupiters easier to see with direct...Ch. 21 - A friend of yours who did not do well in her...Ch. 21 - Observations suggest that it takes more than 3...Ch. 21 - Suppose you wanted to observe a planet around...Ch. 21 - Why were giant planets close to their stars the...Ch. 21 - Exoplanets in eccentric orbits experience large...Ch. 21 - When astronomers found the first giant planets...Ch. 21 - An exoplanetary system has two known planets....Ch. 21 - Kepler’s third law says that the orbital period...Ch. 21 - Calculate the transit depth for an M dwarf star...Ch. 21 - If a transit depth of 0.00001 can be detected with...Ch. 21 - What fraction of gas giant planets seems to have...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- List any similarities between discovered exoplanets and planets in our solar system.arrow_forwardWhy did it take astronomers until 1995 to discover the first exoplanet orbiting another star like the Sun?arrow_forwardWhat revisions to the theory of planet formation have astronomers had to make as a result of the discovery of exoplanets?arrow_forward
- If a star must remain on the main sequence for at least 4 billion years for life to evolve to intelligence, what is the most massive a star that can form and still possibly harbor intelligent life on one of its exoplanets? (Hints: Use the formula for stellar life expectancies, Eq. 121, and data in Appendix Table A-7.)arrow_forwardDue to the fact that planets emit more infrared radiation than any other type of light, astronomers have the best chance of directly imaging an exoplanet in the infrared part of the spectrum. select one of the following: A) true B) falsearrow_forwardIs there an exoplanet detection method that works better with detecting exoplanets that are at a large distance from their host star? a) none b) radial velocity method c) direct detection d) transit methodarrow_forward
- Mulchatna is an exoplanet orbiting star 12 Altair. If the planet’s orbital period is 4.25 days and 12 Altair constant is 3.2X10^-19 s^2/m^3, what is Mulchatna orbital radius?arrow_forwardIf you could visit another planetary system while the planets are forming, would you expect to see the condensation sequence at work, or do you think that process was most likely unique to our Solar System? How do the properties of the extrasolar planets discovered so far affect your answer? Do you expect the most planetary system in the Universe have analogs to our Solar System’s asteroid belt and Kuiper Belt? Would all planetary systems show signs of an age of heavy bombardment? If the solar nebula hypothesis is correct, do you think there are more planets in the Universe than stars? Why or why not?arrow_forwardWhich of the following is not a very useful method for detecting an exoplanet? (16.8) (a) the observation of a stars motion (b) the observation of Doppler shifts in the spectrum of a star (c) the detection of alien electromagnetic signalsarrow_forward
- An exoplanetary system has two known planets. Planet X orbits in 290 days and Planet Y orbits in 145 days. Which planet is closest to its host star? If the star has the same mass as the Sun, what is the semi-major axis of the orbits for Planets X and Y?arrow_forwardWhen astronomers found the first giant planets with orbits of only a few days, they did not know whether those planets were gaseous and liquid like Jupiter or rocky like Mercury. The observations of HD 209458 settled this question because observations of the transit of the star by this planet made it possible to determine the radius of the planet. Use the data given in the text to estimate the density of this planet, and then use that information to explain why it must be a gas giant.arrow_forwardWhere would you look for some “original” planetesimals left over from the formation of our solar system?arrow_forward
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