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Measuring Stars

QuestionAnswer
An H–R diagram is a statistical plot of the following stellar properties: luminosity and temperature
If an object is one light year away, we see it by light that left it 12 months ago
If the distance between the Sun and a spacecraft were to triple, how would the light intensity per unit area change? It would be 9 times less intense per unit area.
In the spectrum of an A star, you would expect to find lines caused by neutral hydrogen
The color of a star is principally determined by temperature
The space velocity of a star can be determined from the transverse velocity and the radial velocity.
The total radiation from a star depends on its temperature and size
What is the basic unit of distance used in measuring distances to stars? parsec
Which of the following properties of a star is the primary determining factor for its location on the main sequence? Its mass at the time of its formation
What property of stars can only be measured using binary star systems? mass
Created by: katesmarie
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