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The easiest way is to look at a picture of the star and then look at another one taken six months later. If it has moved, that can be seen on the photo when you look at it in relation to the stars in the background of the photo. That was the first method used to find the distance to the nearest stars, and it was a big surprise to find out how far they actually were.
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How do astronomers determine the surface temperatures of the stars?
By their color, primarily. There is a very strong correlation between the stars color and it's temperature.
How do scientists determine the chemical makeup of the stars?
Different chemicals emit and absorb light at various wavelengths. Astronomers can look at the wavelength of light coming from stars and determine which chemicals must be present.
Using the Doppler effect astronomers can determine a stars what?
How close and far something is from you.
What do astronomers believe are 'born' in nebulae?
Stars.
Who studies the stars moons and planets?
Astronomers.
What was improved when Han Dynasty astronomers measured how the stars moved?
Calendars and time-keeping.
Why is the HR diagram useful to astronomers?
It can be used to determine a Stars lifetime, its different stages.
How does a spectroscope enable astronomers to determine the characteristics of distant stars and galaxies?
en.wikipedia.org/wiki/Spectroscopy
How do astronomers determine the surface temperatures of the stars?
By their color, primarily. There is a very strong correlation between the stars color and it's temperature.
How do astronomers determine the precession of the earth?
By finding a constant, continuous change in the coordinates of stars every year.
How do scientists determine the chemical makeup of the stars?
Different chemicals emit and absorb light at various wavelengths. Astronomers can look at the wavelength of light coming from stars and determine which chemicals must be present.
Using the Doppler effect astronomers can determine a stars what?
How close and far something is from you.
What does astronomers?
Stars...
Who classifies stars?
Astronomers classify stars.
What method do astronomers use to determine the distance to a relatively close star like Sirius?
For nearby stars, the parallax method is used.
How do astronomers label some stars within constellations?
Astronomers label the stars within constellations according to apparent magnitude.
Rocks are to geologists as stars are to?
Rocks are to geologists as stars are to astronomers.
