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Astronomy Test 1
Ch. 1, 2, 3, 4, 5,
11
Astronomy
Undergraduate 1
09/17/2009

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Cards

Term
Put these in order from closed to you to farthest away.
you, Earth, Local Group, Local Supercluster, solar system, Milky Way
Definition
d) you, Earth, solar system, Milky Way, Local Group, Local Supercluster
Term
Ecliptic plane
Definition
The path of the earth’s orbit about the Sun
Term
A tropical year is not the same as the a sidereal year due to what?
Definition
the precession of earth’s axis of rotation
Term
29.5 days
Definition
Days in a synodic month.
Term
A solar day is longer than a sidereal day due to what?
Definition
Earth’s rotation about the Sun
Term
3600 arcseconds
Definition
Amount of arcseconds in a degree
Term
60 arcminutes
Definition
Amount of arcminutes in a degree
Term
Parallax
Definition
The apparent displacement of a foreground object relative to the background due to changes in observer’s position
Term
The Horizon
Definition
The boundary between the earth and the sky
Term
12 or 13 constellations
Definition
Amount of constellations in the zodiac
Term
The gravitational force of the Moon
Definition
Cause of Earth’s precession (the slow movement of the axis of a spinning body around another axis due to a torque acting to change the direction of the first axis.)
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