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14 Cards in this Set

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Distance from the Sun resulting from 1 arc second as seen from Earth.
PARSEC
Unit of measurement for parallax
PARSEC
Number of degrees in a circle
360
Number of arc minutes in one degree
60
Number of arc seconds in one arc minute
60
Two things the angular size depends upon
ACTUAL SIZE, DISTANCE
Distance between two points of observation
BASELINE
The use of three points to calculate distance
TRIANGULATION
Calculating distance using measured baseline and angles
TRIANGULATION or PARALLAX
Uses the apparent motion of an object against a background from two viewpoints
PARALLAX
As the apparent parallax shift increases, the distance to the object...
DECREASES
As the distance to the object increases, the parallax angle...
DECREASES
Preferred baseline size
LARGE
Typical baseline used in astronomy
PERIHELION/APHELION or TWO POINTS IN ORBIT