AST A105 homework1

AST A105 homework1 - 1. The diurnal (daily) motion of stars...

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Unformatted text preview: 1. The diurnal (daily) motion of stars through the sky is due to A) the motion of the earth around the sun B) the rotation of the earth C) the epicyclic nature of the celestial sphere D) the rotation of the celestial sphere 2. If you could see stars during the day, the drawing at right shows what the sky would look like at noon on a given day. The Sun is near the stars of the constellation Gemini. Near which constellation would you expect the Sun to be located at sunrise ? A) Leo B) Cancer C) Gemini (the Sun moves eastward, relative to the stars, by approximately one degree per day, so it would be very near its noon location relative to the stars at dawn) D) Taurus E) Pisces 3. What happens during the apparent retrograde motion of a planet? A) The planet rises in the west and sets in the east. B) The planet temporarily reverses its usual eastward motion in the sky with respect to the stars. C) The planet moves backward in its orbit around the Sun. D) The planet moves through constellations that are not part of the zodiac. 4. In which direction does the crescent Moon rise? A) north B) south C) east , as it does at all phases and as do the stars and planets D) west E) The Moon becomes a crescent moon only after it has risen and changed phase. 5. In science, conceptual representations of observed phenomena are referred to as A) facts B) hypotheses C) models D) beliefs 6. The Ptolemaic geocentric model of the Universe has planets moving in A) elliptical orbits about the Sun B) a simple circle about the Earth C) a simple circle about the Sun D) small circles, the centers of which move in a larger circle about the Earth 7. The astronomical unit (AU) is defined to be equal to 7....
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This note was uploaded on 02/21/2012 for the course AST-A 105 taught by Professor Dr.dash during the Spring '12 term at Indiana.

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AST A105 homework1 - 1. The diurnal (daily) motion of stars...

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