The Radial Velocity of a Star or Other Object Is

question 112

Multiple Choice

The radial velocity of a star or other object is measured by

• A) measuring the change in the angular diameter of the object.
• B) watching the object move compared to the background stars.
• C) measuring the intensity of the light in different regions of the blackbody curve.
• D) observing the Doppler shift of spectral lines in the light from the object.

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Definitions:

Z-score

A calculation that determines how a particular value's distance from the mean of a set of values is expressed in standard deviations.

Outlier

An observation in data that is significantly different from the majority of the data, potentially due to variability in the measurement or an experimental error.

Median

The middle value in a data set, when the values are arranged in ascending or descending order, or the average of the two middle numbers when the dataset has an even number of observations.

Third Quartile

The value below which 75% of the data in a data set lie, representing the upper quartile of a distribution.