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 5, Problem 1LTL
To determine
The causes of distortion observed in the star before adapting optics correct the image.
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The Giant Magellan Telescope is a new telescope being built in Chile with a mirror 25 meters in diameter.
Part 1: If you neglect the impact of Earth's atmosphere, what is the angular resolution limit (diffraction limit or resolving power) of this telescope in green light (500 nm)?
Give your answer in arcseconds.
Part 2: The current Magellan telescope has a mirror 6 meters in diameter. How much more light per second will the Giant Magellan capture compared to the current
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The James Webb Telescope is an important innovation in Astronomy and its implementation was first explained to the public during the timeline of our course this summer.
Prepare an explanation which includes the following:
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When astronomers discuss the apertures of their telescopes, they say bigger is better. Explain why.
a) A wider aperture can observe a significantly larger portion of the sky. b) A wider aperture makes a telescope easier to aim. c) A wider aperture allows a telescope to collect more light, so it can produce images with higher resolution. d) A wider aperture allows a telescope to collect more light, so it can detect fainter light sources.
Chapter 5 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 1DQCh. 5 - Consider the “atmospheric windows” of Earth’s...Ch. 5 - The thickness of the plastic in plastic bags is...Ch. 5 - What is the wavelength of radio waves transmitted...Ch. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - H does the resolving power of the 5-rn telescope...Ch. 5 - If you build a telescope with a focal length of...Ch. 5 - Prob. 9PCh. 5 - Prob. 10PCh. 5 - Prob. 1LTLCh. 5 - The star images in the photo in Figure UN 5-4 are...Ch. 5 - The X-ray image in Figure UN 5-5 shows the remains...
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- Many decades ago, the astronomers on the staff of Mount Wilson and Palomar Observatories each received about 60 nights per year for their observing programs. Today, an astronomer feels fortunate to get 10 nights per year on a large telescope. Can you suggest some reasons for this change?arrow_forwardThe HST cost about $1.7 billion for construction and $300 million for its shuttle launch, and it costs $250 million per year to operate. If the telescope lasts for 20 years, what is the total cost per year? Per day? If the telescope can be used just 30% of the time for actual observations, what is the cost per hour and per minute for the astronomer’s observing time on this instrument? What is the cost per person in the United States? Was your investment in the Hubble Space telescope worth it?arrow_forwardOne of the instruments on board the Unreal X-ray Observatory (UXO) has a detector with 3600 pixels x 1800 pixels and a field of view of 30 ar- cmin x 15 arcmin. If each pixel is 24 µm x 24 μm in size, calculate the plate scale, in arcsec mm-¹, and hence determine the focal length of the UXO telescope.arrow_forward
- The James Webb Space Telescope has a primary mirror of diameter ? = 6.5metres. When observing at 1100nm wavelength, calculate the minimum angular separation between two stars which can just be resolved; give your answer in arcseconds (arcsec), where 1 arcsec = 1/3600 degree, to 3 decimal places.arrow_forwardThe resolving power of a 10-centimeter (4-inch) telescope is 1.16 seconds of arc. What is the resolving power of the 40-inch (100‑cm) Yerkes refractor?arrow_forwardThe 305-m-diameter Arecibo radio telescope pictured in figure below detected radio waves with a 3- cm average wavelength. Hint a. What was the angle between two just-resolvable point sources for this telescope? Minimum resolvable angle was prad. b. How close together could these point sources be at the 2.57 million light-year distance of the Andromeda Galaxy? (Note: Estimated radius of the Andromeda Galaxy is about 7 × 10¹7 km.) x1015 km for minimum The point sources could be as close as resolvable distance.arrow_forward
- Intro to Astronomy: Calculate the angular resolution of the HST (Hubble Space Telescope) operating in green light of wavelength 0.50 (mm). The HST mirror diameter is 2.4 (m). Use formula: Angular resolution (arc seconds) NOTE: wavelength must be in (mm) and mirror diameter in (m) Angular resolution = Q1 =arrow_forwardWhich of the following is NOT a characteristic of the next generation of planned telescopes? Answers: A. multiple focus points B. extreme size C. segmented mirrors D. adaptive optics E. multiple wavebandsarrow_forwardWhich of these is NOT one of the largest optical telescopes in the world? Answers: A. Southern African Large Telescope B. Hobby Eberly Telescope C. Yerkes Telescope D. Keck I Telescope E. Hale Telescopearrow_forward
- Telescopes can now be operated remotely from a warm room, but until about 25 years ago, astronomers worked at the telescope to guide it so that it remained pointed in exactly the right place. In a large telescope, like the Palomar 200-inch telescope, astronomers sat in a cage at the top of the telescope, where the secondary mirror is located, as shown in Figure 6.6. Assume for the purpose of your calculation that the diameter of this cage was 40 inches. What fraction of the light is blocked? Figure 6.6 Focus Arrangements for Reflecting Telescopes. Reflecting telescopes have different options for where the light is brought to a focus. With prime focus, light is detected where it comes to a focus after reflecting from the primary mirror. With Newtonian focus, light is reflected by a small secondary mirror off to one side, where it can be detected (see also Figure 6.5). Most large professional telescopes have a Cassegrain focus in which light is reflected by the secondary mirror down through a hole in the primary mirror to an observing station below the telescope.arrow_forwardTheoretically (that is, if seeing were not an issue), the resolution of a telescope is inversely proportional to its diameter. How much better is the resolution of the ALMA when operating at its longest baseline than the resolution of the Arecibo telescope?arrow_forwardSuppose you are looking for sites for a visible-light observatory, an infrared observatory, and a radio observatory. What are the main criteria of excellence for each? What sites are actually considered the best today?arrow_forward
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