astro quizzes

astro quizzes - HOMEWORK 1 1 Marks 1 The stars in a...

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HOMEWORK 1 1 Marks: 1 The stars in a constellation are: Choose one answer. a. very close to each other Incorrect b. connected by faint blue lines, invisible from Earth, but shown in textbooks Incorrect c. influence a person's personality depending on his or her birthday Incorrect d. never visible from both the northern and southern hemisphere at the same time Incorrect e. among the closest stars in the galaxy to Earth Correct correct ! Correct 2 Marks: 1 The celestial sphere Choose one answer. a. rotates with the Earth Incorrect stars would not move across the sky at night b. has a celestial north pole aligned with the Earth's north pole Correct c. is mapped by the coordinates "latitude" and "longitude" Incorrect d. looks the same to all observers, anywhere in the galaxy Incorrect e. has a large radius, at which the stars are located Incorrect Correct 3 Marks: 1 Suppose a star is located with a declination 30.25 degrees north of the celestial equator. Using the notation of degrees,minutes,seconds it is located how far above the celestial equator? Choose one answer.
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a. 30 degrees, 25 minutes, 0 seconds Incorrect b. 30 degrees, 0 minutes, 0 seconds Incorrect c. 30degrees, 15 minutes, 0 seconds Correct correct d. 30 degrees, 0 minutes, 25 seconds Incorrect e. 30 degrees, 0 minutes, 15 seconds Incorrect Correct 4 Marks: 1 From noon on one day to noon of the next day. .. Choose one answer. a. the stars return to the same place on the sky Incorrect b. is 4 minutes less than 24 hours Incorrect c. the Earth makes a full 360 rotation Incorrect d. takes one sidereal day Incorrect e. takes one solar day Correct correct smile Correct 5 Marks: 1 Throughout the year the Sun travels throughout the year on the "ecliptic" a path inclined 23.5 degrees relative to the celestial equator because Choose one answer. a. the Earth's axis of daily rotation is inclined 23.5 degrees relative to the plane of its annual orbit. Correct Correct . The angle of the ecliptic is just an "artifact" of the fact that the "celestial sphere" is defined for Earth-based observers. b. the Earth's axis of daily rotation is rotated at an angle of 23.5 degrees relative to the galactic plane Incorrect c. the Earth's axis of daily rotation is rotated at an angle of 23.5 degrees relative to the rest of the Universe Incorrect d. the Sun oscillates up and down relative to the plane of the solar system Incorrect e. The Earth wobbles (precesses) up to 23.5 degrees in each direction once per year Incorrect Correct 6
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Marks: 1 Suppose you stood out on a flat field in Kansas every day of the year and watched where the Sun set over (the unobstructed) horizon. You would see the Sun set. .. Choose one answer. a. due south on the summer solstice Incorrect b. at the same position every day Incorrect c. at a different place every day, but between the maximum positions occurring on the solstices Correct Correct . And the two farthest setting points would be separated by 2*23.5=47 degrees. d. exactly due west on the equinoxes
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This note was uploaded on 03/31/2008 for the course ASTR 3 taught by Professor Hauser during the Winter '07 term at UCLA.

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astro quizzes - HOMEWORK 1 1 Marks 1 The stars in a...

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