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Star light, star bright: how bright a star appears to us on Earth depends MAINLY on
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
Which of these stars is the OLDEST?
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
A ___ star has a greater temperature than a ___ star.
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
The process that fuels a star is BEST described as
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
Scientists classify stars by colors: white, red, blue. The color of a star helps to tells us how ________ the star is.
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
Many of the stars we see in the night sky are called blue giants. They put out more energy and burn millions of times brighter than the Sun. Why does the Sun appear much larger and brighter from Earth than blue giant stars?
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
Which process is occurring at the center of all active stars?
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
Luminosity is the amount of energy emitted by a star each second. Stars radiate light over a broad range of frequencies in the electromagnetic spectrum, from the low energy radio waves to high energy gamma rays. The luminosity of a star depends on tw
blue, red
fusion
the star's distance from Earth.
It is closer.
surface area and temperature.
hot
nearly 0% hydrogen
hydrogen molecules being forced together by gravity.
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