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A star is a massive, luminous ball of plasma. For most of its life, a star shines because thermonuclear fusion in its core releases energy that traverses the star's interior and then radiates into outer space.
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Astronomers can determine the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity and motion through space.
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A star begins as a collapsing cloud of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, some of the hydrogen is steadily converted into helium through the process of nuclear fusion.
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Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution.
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Good morning starshine, the earth says hello
you twinkle above us, we twinkle below
good morning starshine, you lead us along
my love and me
as we sing our
early morning singing song
gliddy glub gloopy nibby nabby noopy
la la la - lo lo
sabba sibbi sabba nooby aba naba
lee lee - lo lo
tooby ooby wala
nooby aba naba
early morning singing song
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Good morning . . .
gliddy glub gloopy . . .
Singing a song, humming a song
singing a song
loving a song, laughing a song
singing a song
sing the song
song the sing
song song song sing
sing sing sing song
song song song sing
sing sing sing song
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