Measuring Space: Distances
Terms
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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