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The Hertzsprung-Russell diagram shows that main-sequence stars
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
A light-year is
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
What do the four outer planets have in common?
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
All objects are attracted to each other by the force of
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
The strength of the force of gravity depends on
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
The solar wind is a stream of electrically charged particles that extend outward from the sun's
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
A star is born when
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
Eclipsing binary stars can sometimes be identified because
the distance light travels on one year.
they become dimmer at regular intervals.
nuclear fusion starts.
corona
the masses of the objects and the distance between them.
They are much larger than Earth and are made mainly of hydrogen and helium.
increase in brightness as they increase in temperature.
gravity.
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