Color and the Basics
Composition
Classifying
Distance and Motion
Brightness
100
What color stars are the hottest?
Blue
100
When you look at a white light through a glass prism, you see a rainbow of colors called a.....
Spectrum
100
How were stars originally classified?
Stars were classified according to the elements of which they were made out of.
100
What is the distance that light travels in one year?
Light-year
100
What happens to the brightness of a star as it becomes further away?
The star's brightness decreases or the star gets dimmer.
200
What color are the coolest stars?
Red
200
What instrument do astronomers use to break a star's light into a spectrum?
Spectrograph
200
How are stars classified now?
Stars are now classified by how hot they are or stars are now classified by temperature.
200
What is an apparent shift in an object's position when viewed from different locations?
Parallax
200
When two stars are at the same distance what does their brightness look like?
The stars have the same brightness.
300
The color of a star depends on its....
Temperature
300
List the three types of spectra that we have talked about
Continuous Spectrum, Emission Spectrum, Absorption Line Spectrum
300
What were the brightest stars in the sky originally called?
First-magnitude stars
300
True or false: During each season, the Earth faces a different part of the sky at night.
True
300
What is the brightness of a star as seen from the Earth?
Apparent Magnitude
400
Describe the interior and exterior of a star.
The inner layers of a star are very hot and dense. The outer layers of a star are made up of cool gases.
400
What can a scientist learn about a star from its spectrum?
Its composition and temperature.
400
What type of numbers represent dimmer stars?
Positive numbers
400
True or false: Star patterns will never change.
False
400
What is the brightness that a star would have at a distance of 32.6 light-years away from Earth? Also known as the actual brightness of a star.
Absolute Magnitude
500
Which is hotter Betelgeuse or Rigel?
Betelgeuse
500
Why do black lines appear on an absorption spectrum? (breaks in a spectrum)
They show where less light is absorbed by a star's atmosphere.
500
What types of numbers represent brighter stars?
Negative numbers
500
Because of the Earth's rotation, all of the stars in the sky appear to make one complete circle around Polaris every _______ hours.
Every 24 hours.
500
Why does the sun seem brighter to us on Earth than any of the other stars in our galaxy?
The sun is closer to Earth so it appears brighter.
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