The Solar System
10th Edition
ISBN: 9781337672252
Author: The Solar System
Publisher: Cengage
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Chapter 2, Problem 2RQ
To determine
The description of star’s greek letter.
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Star A has an apparent magnitude of –1.5 and is 12.6 light-years from Earth. Star B has an apparent magnitude of 0.4 and is 15.6 light-years from Earth.
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Consider two identical stars, A and B. Star B is 10 times farther away than star A. What is the difference
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Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from Earth, with a 6-month interval between each observation. Hence define the parsec, and calculate its value in astronomical units and metres. The star Betelgeuse is observed to have a parallax angle p = 4.5 × 10−3 arcseconds. State the distance of Betelgeuse in units of parsecs and light years.
Chapter 2 Solutions
The Solar System
Ch. 2 - Why are most of the constellations that were...Ch. 2 - Prob. 2RQCh. 2 - Which is the asterism and which is the...Ch. 2 - Prob. 4RQCh. 2 - Prob. 5RQCh. 2 - What does the word apparent mean in apparent...Ch. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - Prob. 11RQCh. 2 - Prob. 12RQCh. 2 - Prob. 13RQCh. 2 - Prob. 14RQCh. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - Why does the number of circumpolar constellations...Ch. 2 - Explain two reasons winter days are colder than...Ch. 2 - How does the date of the beginning of summer in...Ch. 2 - If it is the first day of spring in your...Ch. 2 - It is the first day of summer. Will the days start...Ch. 2 - How much flux from the Sun does the Northern...Ch. 2 - Prob. 25RQCh. 2 - Prob. 26RQCh. 2 - How Do We Know? Why is astrology a pseudoscience?Ch. 2 - Prob. 28RQCh. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - If two stars differ by 8 magnitudes, what is their...Ch. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - By what factor is the full moon brighter than...Ch. 2 - What is the angular distance from the north...Ch. 2 - Prob. 12PCh. 2 - If you are at latitude 30 degrees north of Earth’s...Ch. 2 - Prob. 14PCh. 2 - Prob. 1SPCh. 2 - Arrange the following in order of increasing...Ch. 2 - Prob. 1LLCh. 2 - Prob. 2LLCh. 2 - Look at the view from Earth on March 1 in Figure...Ch. 2 - Look at Figure 2-9, shown here. If you see...
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- As seen from Earth, the Sun has an apparent magnitude of about 26.7 . What is the apparent magnitude of the Sun as seen from Saturn, about 10 AU away? (Remember that one AU is the distance from Earth to the Sun and that the brightness decreases as the inverse square of the distance.) Would the Sun still be the brightest star in the sky?arrow_forwardExplain the origin of the magnitude designation for determining the brightness of stars. Why does it seem to go backward, with smaller numbers indicating brighter stars?arrow_forwardUrsa Minor contains the pole star, Polaris, and the asterism known as the Little Dipper. From most locations in the Northern Hemisphere, all of the stars in Ursa Minor are circumpolar. Does that mean these stars are also above the horizon during the day? Explain.arrow_forward
- The star Antares has an apparent magnitude of 1.0, whereas the star Procyon has an apparent magnitude of 0.4. Which star appears brighter in the sky?arrow_forwardWhat two factors determine how bright a star appears to be in the sky?arrow_forwardVerify that if two stars have a difference of five magnitudes, this corresponds to a factor of 100 in the ratio (b2b1) ; that 2.5 magnitudes corresponds to a factor of 10; and that 0.75 magnitudes corresponds to a factor of 2.arrow_forward
- The figure below shows the radial velocity of a star plotted as a function of time over the course of 20 days. Where is the planet in its orbit around the star when the star's radial velocity is 18 km/s? How do I determine this?arrow_forwardWhich of the following is least reasonable regarding the magnitude scale: Group of answer choices The numerical difference between a star's absolute and apparent magnitudes is a measure of the distance to the star. If the Sun were moved to a distance of 10 parsecs, its apparent magnitude would be about 4.8 and it would therefore not be visible to the naked eye. The fact that Sun's absolute magnitude of 4.8 is greater than the Sun's apparent magnitude of -27 implies that the Sun is a lot closer than 10 parsecs. Apparent magnitude measures a star's apparent brightness when viewed at the star's actual distance from the observer. A star's absolute magnitude is its apparent magnitude when viewed from a distance of 10 parsecs.arrow_forward
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