Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 2, Problem 41Q
To determine
To find: the right ascension and declination of the winter solstice.
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Chapter 2 Solutions
Universe: Stars And Galaxies
Ch. 2 - Prob. 1QCh. 2 - Prob. 2QCh. 2 - Prob. 3QCh. 2 - Prob. 4QCh. 2 - Prob. 5QCh. 2 - Prob. 6QCh. 2 - Prob. 7QCh. 2 - Prob. 8QCh. 2 - Prob. 9QCh. 2 - Prob. 10Q
Ch. 2 - Prob. 11QCh. 2 - Prob. 12QCh. 2 - Prob. 13QCh. 2 - Prob. 14QCh. 2 - Prob. 15QCh. 2 - Prob. 16QCh. 2 - Prob. 17QCh. 2 - Prob. 18QCh. 2 - Prob. 19QCh. 2 - Prob. 20QCh. 2 - Prob. 21QCh. 2 - Prob. 22QCh. 2 - Prob. 23QCh. 2 - Prob. 24QCh. 2 - Prob. 25QCh. 2 - Prob. 26QCh. 2 - Prob. 27QCh. 2 - Prob. 28QCh. 2 - Prob. 29QCh. 2 - Prob. 30QCh. 2 - Prob. 31QCh. 2 - Prob. 32QCh. 2 - Prob. 33QCh. 2 - Prob. 34QCh. 2 - Prob. 35QCh. 2 - Prob. 36QCh. 2 - Prob. 37QCh. 2 - Prob. 38QCh. 2 - Prob. 39QCh. 2 - Prob. 40QCh. 2 - Prob. 41QCh. 2 - Prob. 42QCh. 2 - Prob. 43QCh. 2 - Prob. 44QCh. 2 - Prob. 45QCh. 2 - Prob. 46QCh. 2 - Prob. 47QCh. 2 - Prob. 48QCh. 2 - Prob. 49QCh. 2 - Prob. 50QCh. 2 - Prob. 51QCh. 2 - Prob. 52QCh. 2 - Prob. 53QCh. 2 - Prob. 54QCh. 2 - Prob. 55QCh. 2 - Prob. 56QCh. 2 - Prob. 57QCh. 2 - Prob. 58QCh. 2 - Prob. 59QCh. 2 - Prob. 60QCh. 2 - Prob. 61Q
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- In a part of Earth’s orbit where Earth is moving faster than usual around the Sun, would the length of the solar day change? If so, how? Explain.arrow_forwardWhat are advantages and disadvantages of apparent solar time? How is the situation improved by introducing mean solar time and standard time?arrow_forward6. A star is observed to cross the meridian (due south) at an elevation of 34°, as seen from an observatory sited at a latitude of 42° north. What is the declination of the star? At the moment of transit, a clock running on Universal Time (UT) read 03 h 16min 24 s. At the previous midnight, the sidereal time was 14h 38 min 54 s. Calculate the Right Ascension of the star.arrow_forward
- The Earth covers about 1° per day in its orbit about the Sun, and the solar day is slightly longer than the sidereal day. If Earth spun in a retrograde direction like Venus but it still had the same sidereal period (23 hr 56 min), how long would the solar day be? The solar day would be 72 hr and min.arrow_forwardIf city is located in 2.8° north latitude and 46.0° east longitude. From there, you want to fly to a city in 7° north latitude and 52° east longitude. How much is the arc length of the big circle at 11000 m when the earth's radius is 6370 km? The arc length is 14223 km. Give your answer rounded to one kilmetre. Your last answer was interpreted as follows: 14223 XAnswer is incorrect. Keep centre of Earth as origin and define vectors to cities. Try again.arrow_forwardIllustrate 1. The relation between sidereal time, right ascension and hour angle of any point at a given instant2. The relation between sidereal and mean time at any instantarrow_forward
- Right Ascension and Declination is a coordinate system for objects in the sky, and is analogous to longitude and latitude coordinates, respectively, for objects on Earth. Right ascension (RA) coordinates are given in hours (h), minutes (m), and seconds (s). Declination (DEC) coordinates are given in degrees (°), arcminutes ('), and arcseconds ("). Sirius is the brightest star in the night sky. Its RA and DEC coordinates are 6h 45 m 7.96 s and -16° 44' 78.6". Using unit conversion, find the RA coordinate only in hours and round the coordinate to 5 significant figures.arrow_forwardOf the following methods, which one can you use to directly calculate the peak altitude of the Sun in the sky on that day? a. by using the observer's watch and the Sun's azimuth b. by using the observer's latitude and the Sun's right ascension c. by using the observer's longitude and the ecliptic plane d. by using the observer's latitude and the Sun's declination e. by using the observer's altitude and the ecliptic planearrow_forwardFor an entire year, you carefully plot and track the sun's position relative to the background stars (i.e., the celestial sphere). Which of the following is an accurate description of what you observe for the sun's annual drift relative to the celestial sphere? Select one: a. the sun appears to shift only north or south, with no apparent drift east or west b. each day, the sun appears to drift primarily from east to west c. each day, the sun appears to drift primarily from west to east d. the sun does not appear to drift at all relative to the background stars, as defined by our 24 hour dayarrow_forward
- which of the following is an accurate description of how the sun drifts annually relative to the celestial sphere? Choose one of the following: a. the sun appears to shift only north or south, with no apparent drift east or west b. each day, the sun appears to drift primarily from east to west c. each day, the sun appears to drift primarily from west to east d. the sun does not appear to drift at all relative to the background stars, as defined by our 24 hour dayarrow_forward1. Calculate the local solar time and the corresponding hour angle at 9 A.M (local standard time, L.St.T) on October 21st, for the Indian city of Kolkata located at 22°82'N and 88°20'E, the LSM for India is 82°30'. the EOT for Kolkata on October 21st is 15 minutes.arrow_forwardDraw the phase of the koon. Label neap tides with an N and spring tides with Sarrow_forward
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