Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Textbook Question
Chapter 15, Problem 3RQ
What evidence can you cite that disks of gas and dust are common around young stars?
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Chapter 15 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 15 - What produced the helium now present in the Sun’s...Ch. 15 - What produced the iron and heavier elements like...Ch. 15 - What evidence can you cite that disks of gas and...Ch. 15 - According to the solar nebula theory, why is the...Ch. 15 - Why does the solar nebula theory predict that...Ch. 15 - Prob. 6RQCh. 15 - If you visited another planetary system, would you...Ch. 15 - Why is almost every solid surface in our Solar...Ch. 15 - What is the difference between condensation and...Ch. 15 - Why don’t Terrestrial planets have rings like the...
Ch. 15 - How does the solar nebula theory help you...Ch. 15 - How does the solar nebula theory explain the...Ch. 15 - What does the term differentiated mean when...Ch. 15 - What processes cleared the nebula away and ended...Ch. 15 - Why would astronomically short lifetime of gas and...Ch. 15 - Prob. 16RQCh. 15 - What evidence can you cite that planets orbit...Ch. 15 - Why is the existence of “hot Jupiters” puzzling?...Ch. 15 - How Do We know? The evidence is overwhelming in...Ch. 15 - How Do We know? How can scientists know anything...Ch. 15 - If you could visit another planetary system while...Ch. 15 - Prob. 2DQCh. 15 - If the solar nebula hypothesis is correct, do you...Ch. 15 - If you observed the Solar System from the nearest...Ch. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Suppose that Earth grew to its present size in 1...Ch. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 1LTLCh. 15 - Why do astronomers conclude that the surface of...Ch. 15 - Prob. 3LTL
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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
- Compare the scale (size) of a typical dusty disk around a forming star with the scale of our solar system.arrow_forwardIf a transit depth of 0.00001 can be detected with the Kepler spacecraft, what is the smallest planet that could be detected around a 0.3 RsunM dwarf star?arrow_forwardWould you expect to find any white dwarfs in the Orion Nebula? (See The Birth of Stars and the Discovery of Planets outside the Solar System to remind yourself of its characteristics.) Why or why not?arrow_forward
- On which edge of the main sequence band on an HR diagram would the zero-age main sequence be?arrow_forwardIf a protostellar disk is 200 AU in radius and the disk plus the forming star together contain 2 solar masses, what is the orbital speed at the outer edge of the disk in kilometers per second? (Hint: Use the formula for circular velocity, Eq. 5-1a. Remember that the formula requires units of kg, m, and s.) (Notes: 1 AU = 1.5 1011 m; the mass of the Sun can be found in the Chapter 8 Celestial Profile: The Sun.)arrow_forwardWhat properties of the gas and dust disks observed around many protostars indicate they could evolve into planetary systems?arrow_forward
- What is a planetary nebula? Will we have one around the Sun?arrow_forwardIf a protostellar disk is 200 AU in radius and the disk plus the forming star together contain 2 solar masses, what is the orbital speed at the outer edge of the disk in kilometers per second? (Hint: See the formula for circular orbital velocity in Reasoning with Numbers 4-1.)arrow_forwardDid hydrogen gas condense from the nebula as the nebula cooled? What about helium gas? How do you know?arrow_forward
- If the Orion Nebula is 8 pc in diameter and has a density of about 6.0 108 hydrogen atoms/m3, what is its total mass? (Notes: The volume of a sphere is 43r3; 1 pc = 3.1 1016 m; the mass of a hydrogen atom is 1.7 1027 kg.)arrow_forwardExplain why visual observation of the gas giants is not sufficient to determine their rotation periods, and what evidence was used to deduce the correct periods.arrow_forwardWhite Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2 x 106 g/cm?. Find the radius of the white dwarf in km to three significant digits. (Hint: Density = mass/volume, and the volume of a 4 sphere is Tr.) 3 km Compare your answer with the radii of the planets listed in the Table A-10. Which planet is this white dwarf is closely equal to in size? I Table A-10 I Properties of the Planets ORBITAL PROPERTIES Semimajor Axis (a) Orbital Period (P) Average Orbital Velocity (km/s) Orbital Inclination Planet (AU) (106 km) (v) (days) Eccentricity to Ecliptic Mercury 0.387 57.9 0.241 88.0 47.9 0.206 7.0° Venus 0.723 108 0.615 224.7 35.0 0.007 3.4° Earth 1.00 150 1.00 365.3 29.8 0.017 Mars 1.52 228 1.88 687.0 24.1 0.093 1.8° Jupiter 5.20 779 11.9 4332 13.1 0.049 1.30 Saturn 9.58 1433 29.5 10,759 9.7 0.056 2.5° 30,799 60,190 Uranus 19.23 2877 84.3 6.8 0.044 0.8° Neptune * By definition. 30.10 4503 164.8 5.4 0.011 1.8° PHYSICAL PROPERTIES (Earth = e)…arrow_forward
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