21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 6, Problem 33QP
To determine

The change in light gathering power of a telescope while its aperture size is increased from 4 inch to 16 inch.

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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 Magellan?
You record the spectrum of a distant star using a telescope on the ground on Earth. Upon analysing the spectrum, you discover absorption lines spaced at intervals typical of oxygen atoms. Which of the following are possible interpretations of this evidence? Select all that apply. The width of the spectral lines gives the diameter of the star The star is likely orbited by habitable planets with breathable atmospheres. The height of the spectral lines above the star's general blackbody spectral curve tells us how much oxygen is in the star The atmosphere of Earth contains oxygen The red or blueshift of the set of lines can tell us the speed of the star's motion toward or away from us
What is the difference between a prime focus, a Cassegrain focus, and a Newtonian focus telescope?
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