EXPLORATIONS:INTRO.TO ASTRONOMY-ACCESS
9th Edition
ISBN: 9781260432251
Author: ARNY
Publisher: MCG
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Chapter 1, Problem 3TQ
(1.1) Can you think of an astronomical reason why the zodiac may have been divided into 12 signs rather than 8 or 16?
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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.
The earth revolves around the sun in exactly 365 1/4 days which is equivalent to 1 year. To make up for the loss of 1/4 day, the calendar was adjusted so that we have a leap year for every 4 years. If the earth were to speed in its motion slightly so that a year would be completed in exactly 365 days and 6 hours, how often would we need to have a leap year?
The difference in the length of the day between May 25 and November 27 for a city located at latitude 40.47 at midday is:
1-9.16h
2-7.16h
3-5.16h
Chapter 1 Solutions
EXPLORATIONS:INTRO.TO ASTRONOMY-ACCESS
Ch. 1 - (1.1) What is the celestial sphere? What are the...Ch. 1 - (1.1) What is the difference between rotation and...Ch. 1 - (1.1/1.2) What is a constellation, and what is...Ch. 1 - (1.2) What causes the seasons?Ch. 1 - What causes the Moons phases?Ch. 1 - (1.3) How long does it take the Moon to go through...Ch. 1 - (1.2) Why does the position of sunrise along the...Ch. 1 - Why arent there eclipses each month?Ch. 1 - (1.1) If you were standing on Earths equator,...Ch. 1 - Prob. 2TQ
Ch. 1 - (1.1) Can you think of an astronomical reason why...Ch. 1 - Draw sketches to show the angles setting stars...Ch. 1 - Prob. 5TQCh. 1 - Prob. 6TQCh. 1 - (1.2) Why does the position of sunrise along the...Ch. 1 - (1.2) Why do we have time zones? Sketch and label...Ch. 1 - (1.3) Provide two or three pieces of evidence you...Ch. 1 - (1.3) If the Moon orbited Earth in the opposite...Ch. 1 - (1.1) If Earth turns one full rotation in...Ch. 1 - (1.2) From a latitude of 55, what is the highest...Ch. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - (1.1) If you are standing at Earths North Pole,...Ch. 1 - Prob. 2TYCh. 1 - Prob. 3TYCh. 1 - Prob. 4TYCh. 1 - (1.2) In which of the following locations can the...Ch. 1 - Prob. 6TYCh. 1 - (1.3) You observe the Moon rising at 6 p.m.,...Ch. 1 - (1.3) You observe the Moon rising at 3 p.m., a few...Ch. 1 - Prob. 9TYCh. 1 - (1.4) Figure 1.22 (right) shows an eclipse of the...Ch. 1 - (1.4) If the Moon were to expand to twice its...
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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
- Where are you on Earth if you experience each of the following? (Refer to the discussion in Observing the Sky: The Birth of Astronomy as well as this chapter.) A. The stars rise and set perpendicular to the horizon. B. The stars circle the sky parallel to the horizon. C. The celestial equator passes through the zenith. D. In the course of a year, all stars are visible. E. The Sun rises on March 21 and does not set until September 21 (ideally).arrow_forwardWhich of the following is not a contributing factor in causing eclipses? (17.2) (a) the rotation of the Earth about its axis (b) the inclination of the Moons orbit (c) the varying distance between the Earth and the Moon (d) the varying distance between the Earth and the Sunarrow_forwardWhy is it difficult to construct a practical calendar based on the Moon’s cycle of phases?arrow_forward
- Describe a practical way to determine in which constellation the Sun is found at any time of the year.arrow_forwardDiscuss how latitude and longitude on Earth are similar to declination and right ascension in the sky.arrow_forwardShow that the Gregorian calendar will be in error by 1 day in about 3300 years.arrow_forward
- 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_forwardIn a part of Earth’s orbit where Earth is moving faster than usual around the Sun, would the length of the sidereal day change? If so, how? Explain.arrow_forwardWhere would you go on Earth if you wanted to be able to see both the north celestial pole and the south celestial pole at the same time?arrow_forward
- What can you learn from determining the maximum elevation of the Sun or a star above the horizon using a sextant? What other information, if any, is required for you to determine your longitude on the Earth?arrow_forwardConsider a calendar based entirely on the day and the month (the Moon’s period from full phase to full phase). How many days are there in a month? Can you figure out a scheme analogous to leap year to make this calendar work?arrow_forwardThe Great Pyramid of Giza was constructed nearly 5000 years ago. Within the pyramid, archaeologists discovered a shaft leading from the central chamber out of the pyramid, oriented for favorable viewing of the bright star Thuban at that time. Thinking about Earth’s precession, explain why Thuban might have been an important star to the ancient Egyptians.arrow_forward
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