Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 12, Problem 11E
The Hubble Space Telescope images of Pluto in 2002 showed a bright spot and some darker areas around it. Now that we have the close-up New Horizons images, what did the large bright region on Pluto turn out to be?
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Chapter 12 Solutions
Astronomy
Ch. 12 - What are the moons of the outer planets made of,...Ch. 12 - Compare the geology of Callisto, Ganymede, and...Ch. 12 - What is the evidence for a liquid water ocean on...Ch. 12 - Explain the energy source that powers the...Ch. 12 - Compare the properties of Titan’s atmosphere with...Ch. 12 - How was Pluto discovered? Why did it take so long...Ch. 12 - How are Triton and Pluto similar?Ch. 12 - Describe and compare the rings of Saturn and...Ch. 12 - Why were the rings of Uranus not observed directly...Ch. 12 - List at least three major differences between...
Ch. 12 - The Hubble Space Telescope images of Pluto in 2002...Ch. 12 - Saturn’s E ring is broad and thin, and far from...Ch. 12 - Why do you think the outer planets have such...Ch. 12 - Ganymede and Callisto were the first icy objects...Ch. 12 - Compare the properties of the volcanoes on Io with...Ch. 12 - Would you expect to find more impact craters on Io...Ch. 12 - Why is it unlikely that humans will be traveling...Ch. 12 - Why do you suppose the rings of Saturn are made of...Ch. 12 - Suppose you miraculously removed all of Saturn’s...Ch. 12 - We have a lot of good images of the large moons of...Ch. 12 - In the Star Wars movie Star Wars Episode VI:...Ch. 12 - Which would have the longer orbital period: a moon...Ch. 12 - How close to Uranus would a spacecraft have to get...Ch. 12 - Saturn’s A, B, and C Rings extend 75,000 to...Ch. 12 - Use the information in Appendix G to calculate...Ch. 12 - The average distance of Enceladus from Saturn is...
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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
- Did hydrogen gas condense from the nebula as the nebula cooled? What about helium gas? How do you know?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_forwardThere is one part to this question. I need to know the cm. Thank you!arrow_forward
- The current precision of the Doppler shifts in the absorption lines in stellar spectra is ~3 km s-'. Show that it would not be possible to detect the presence of the Earth from a distant solar system using the Doppler method. State one method that might allow the Earth to be detected. (The Earth's mass is 1/333 000 that of the Sun. 1 AU = 1.49× 10"m.) 2.arrow_forwardWhich of the following statements is/are true regarding a nebula? Which of the following statements is/are true regarding a nebula? It is believed that each planet in our solar system began as its own nebula. Over time, a nebula becomes cooler and grows in size. The density of a nebula is greatest at the edges and least in the center. There are no nebulas left in our galaxy because they have all formed stars and planets. Over time, a star will form at the center of a nebula.arrow_forwardConsider a grain of sand that contains 1 mg of oxygen (a typical amount for a medium-sized sand grain, since sand is mostly SiO2). How many oxygen atoms does the grain contain? What is the radius of the sphere you would have to spread them out over if you wanted them to have the same density as the interstellar medium, about 1 atom per cm3? You can look up the mass of an oxygen atom.arrow_forward
- UF, s In 2014, astronomers discovered 22 new KBOS, among those the following three: 2014 with a period of 331.1 years; 2014 TT, with a period of 280.8 years; 2014 QM with a period of 315.2 years. Given that information and knowing that Neptune's period is 85 441 164.8 years, which of those objects - if any- are likely part of the Plutino family of KBOS? Show your work that lead you to your conclusion.arrow_forwardTaking Neptune to be at a distance of 30.6 AU from the Sun, how longdoes it take for a photon to travel from the Sun to Neptune? Give youranswer in units of minutesarrow_forwardthe nearest star to our sun is alpha centauri, which is about 4.4 light-years away. assume that it too has an Oort cloud about 1.6 light years in diameter. Show that there is enough space between us andnit to fit 1.75 solar systems.arrow_forward
- Problem 2. Thermal Energy of the Gas Giants: Energy Radiated by Saturn (Palen, et. al., 1st Edition, Chapter 8, problems 40, 62) The equilibrium temperature (Links to an external site.) for Saturn should be 82 K but instead we find an average temperature of 95 K. How much more energy is Saturn radiating into space than it absorbs from the sun? Does this violate the law of conservation of energy? What is the source of this additional energy?arrow_forwardThe planet Uranus was discovered in 1781, and Neptune, the next planet outward from the Sun, was discovered in 1846. Imagine you're an astronomer in 1846, and you start wondering if there's another planet out beyond Neptune. You decide to try and discover its existence using the same method that was used for Neptune. How will you do this? Group of answer choices You'll recruit a large number of astronomers to use their telescopes to carefully scan the sky in directions that are far from the ecliptic. The regions around the north and south celestial poles will probably be the best "hunting grounds" for the new planet. You'll examine Uranus and Neptune very carefully, on every clear night, for several years, to see if you can find any evidence that sunlight has been reflected off of the `new' planet, then off of Uranus or Neptune, before arriving on Earth. On rare occasions when Neptune passes in front of the Sun, as seen from Earth, you'll look carefully at the Sun (with a safe…arrow_forwardA) A typical dust grain has a radius of about 0.1 micrometers and a mass of 10-14 grams. Roughly how many dust particles are in a cloud containing 1000 Msun of dusty gas if 1% of the cloud's mass is in the form of dust grains? B) What surface area would be covered by these grains if you put them side by side? Assume these grains are spherical. Answer in square light-years. C) Estimate the total surface area covered by the cloud assuming it's matter density is like that of a typical molecular cloud, about 10-21 g/cm3 (Hint: first calculate the clouds volume from it's mass and density, then determine its radius using the formula for volume of a sphere) Answer in square light-years. D) Comparing all above answers, What are the chances (very roughly) that a photon passing through the cloud will hit a dust grain?arrow_forward
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