Magnitude
H-R Diagram
Luminosity
Temperature
Masses/Distances
100
This is the definition of apparent magnitude.
What is the brightness of an object as seen from Earth?
100
These are the two main things about a star that the H-R diagram describes.
What are luminosity and temperature? or What are luminosity and spectral types?
100
This is what luminosity means or represents to an astronomer.
What is the electromagnetic power or the total amount of electromagnetic energy emitted by a star each second?
100
This is the hottest color for a star.
What is blue or blue/violet?
100
This is what a star's mass tells astronomers.
What is how much energy it has available to generate electromagnetic radiation (light)?
200
This is the definition of absolute magnitude.
What is the brightness of stars at a distance of 10 parsecs away?
200
Most stars on an H-R diagram fall into this category.
What is a main-sequence star?
200
These are the units used to measure the luminosity of stars.
What is the luminosity of our sun or solar luminosity?
200
This is the coolest color for a star.
What is red?
200
This is the name of the relationship which can help astronomers calculate a star's distance from us.
What is the distance-magnitude relationship?
300
This is the brightest object in the night sky.
What is the moon?
300
Looking at the chart on page 256, this is the type of star Vega is.
What is a main-sequence star?
300
These are the six luminosity classes.
What are Ia and Ib, II, III, IV, and V?
300
Most giants fall into these three color categories based on temperature.
What are yellow, orange, and red?
300
This is the type of information you can get when you study a double line spectroscopic binary.
What is the individual masses of the two stars?
400
This object has a magnitude of -4.4.
What is Venus?
400
Looking at the chart on page 256, this is what the stars like Betelgeuse and Antares represent.
What are supergiants?
400
This is what the luminosity classes represent/mean.
What is Ia and Ib are supergiants, II, III, and IV are giants, and V are main-sequence stars?
400
This is the temperature of our star, the Sun.
What is about 5,800K?
400
This is an explanation of the mass-luminosity relation.
What is a star's energy production is linked to its mass?
500
This is the magnitude of the dimmest stars visible to the naked eye.
What is 6.0?
500
Looking at the chart on page 256, this is what Barnard's star represents.
What is a red dwarf?
500
Looking at the chart on page 256, the star Regulus falls under what luminosity class?
What is class V?
500
Looking at the chart on page 256, this is the approximate temperature of the star Procyon B.
What is 8,000K or a bit above that?
500
Other than mass, this information can also be gained from studying an eclipsing binary when we combine radial velocity and light curves.
What is diameters, speeds, and stellar separation of the stars?
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