Stars
The brightness of a star is called its.
What is magnitude?
Stars that regularly or repeatedly change in magnitude are called...
What are variable stars?
Groups of stars in a pattern.
What are constellations?
Astronomers call this a star’s apparent brightness, or
What is apparent magnitude?
Theses stars go through periods of swelling and brightening, then shrinking and dimming.
What are pulsating variable stars?
During the year, the Great and Little Bears, Draco, and Cassiopeia seem to revolve around the North Star (Polaris). For that reason, astronomers call these constellations.
What are circumpolar constellations?
The true brightness of a star, called its _____________ ______________, measures how bright a star really is, not just how bright it appears to be.
What is absolute magnitude?
Theses stars are actually pairs of stars that orbit each other because of their gravitational pulls on one another.
What are eclipsing variable stars?
Astronomy
What is the study of stars?