THE CASTOR STAR
By: Sally Kafelghazal
Science 2nd Hour
The Castor Star is about 2.3 times the mass of the Sun.
 The Castor Star is also about twice the size in diameter of the sun.
The Castor star is also 6 times the luminosity compared to the sun.
 The Castor Star is 10,300/ 8,840 K. (“K.” is used to determine the
temperature. “K” stands for Kelvin.)
The Castor Star is a light quite blue. (Color)
 The Castor Star is 52 light years away from the Sun. (Distance from
the Sun)
THE SIZE, TEMPERATURE,
COLOR, AND DISTANCE FROM
THE SUN OF THE CASTOR STAR
The Castor Star in an H-R Diagram
An H-R Diagram
 The Castor Star is
circled dot on the
diagram.
 An H-R Diagram is used
to classify stars and to
understand how stars
change over time.
 H-R stands for
Hertzsprung- Russell
diagram.
The Life Cycle of the star
1.
2.
3.
4.
5.
6.
7.
The life starts as parts of a nebula. A nebula is a large cloud of
gas and dust.
Then the star gets born when the contacting gas and dust from
a nebula gets so hot and dense that nuclear fusion starts.
Then it lives it’s life which the length of it depends on it’s mass;
the more mass, the shorter the life.
The star will begin to run out of fuel and the core will shrink and
the outer core will expand… it will soon become a super giant.
The Super Giant will explode and create a supernova which is an
explosion
Most of the pieces will become part of a nebula and the others
will become a Neutron star. A Neutron star is formed from the
remains of the high-mass stars
The cycle will restart all over again
The Castor’s Age
 The Castor star is still considered young
because it is 200 million years old and has a
life span of around 1 billion years.
 The Castor star is in the beginning of his life
and living his life as part of the Gemini
Constellation.
The Castor Star’s Constellation
 The Castor star is in the Gemini



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constellation
The Gemini constellation means the
constellation of the “Twins”
Castor is a binary star which means it has a
twin, Pollux
Castor is the mortal twin. In Greek
mythology, Castor is famous for his skill in
taming and managing horses.
Pollux is the immortal twin. He is known as
the Boxer.
Together, they were “the Two Gods of
Sparta”
In later Greek days, the twins were Apollo
and Apollon