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They use a unit called the _____________ to measure distances between stars.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
It is born when the contracting gas and dust from a nebula becomes so dense and hot that nuclear fusion starts._____________.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
Most stars are members of groups of two or more stars, called:_____________.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
This is how scientist call the light you can see:_____________.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
According to this theory, the Universe formed in an instant, billions of years ago, in an enormous explosion.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
________collect and focus light and other forms of electromagnetic radiation.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
Scientist use _________ to classify stars.
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
Characteristics used to classify stars include:
star systems
light year
H-R diagrams
Telescopes
color, temperature, size, composition, and brightness.
visible light
stars
The Big Bang Theory
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