Systems in science
The Sun
By Andrew and Mia
One Million Earths
could fit inside the sun
 If a hollow sun was filled up with sphere
earths then around 960,000 would fit
inside. On the other hand if these earths
were squished inside with no wasted
space then 1,300,000 would fit inside.
The suns surface is 11,900 times that of
earths
The sun is almost a perfect
sphere
 There is only 10 km in it’s
polar diameter. The sun is
the closest object to a
perfect sphere seen in
nature
The sun has a very strong
magnetic field
 Solar flares occur when magnetic
energy is released by the sun during
magnetic storms, which we see as sun
spots. In sunspots, the magnetic lines
are twisted and they spin, much like a
tornado on earth.
Light from the sun takes eight
minutes to reach earth
 With a mean average distance of 150
million km from earth and with light traveling
at 300,000 km per second, dividing one by
the other gives us an approximate time of
500 seconds or eight minutes and 20
seconds. Although this energy reaches
earth in a few minutes, it will already have
taken millions of years to travel from the
sun’s core to its surface.
The sun will one day be about
the size of earth
After its red giant phase, the
sun will collapse, retaining
it’s enormous mass, but
containing the approximate
volume of our planet. When
this happens, it will be
called a white dwarf.
The sun travels at 220 kilometers per
second
 The sun is 24,000–26,000 light
years from the galactic center and it
takes 225 – 250 million years to
complete an orbit around the
center of the Milky Way.
The distance from the sun to earth changes
through out year
 Because the earth travels on an elliptical
orbit around the sun, the distance
between the two bodies varies from 147
to 152 million kilometers. The distance
between the earth and the sun is called
an Astronomical unit (AU)
Other Sun Facts
 Age: 4.6 billion years
 Type: yellow dwarf (G’2V)
 Diameter: 1,392,684 km
 Circumference at Equator: 4,370,005.6 km
 Mass: 1,989,100,000,000,000,000,000
billion kg (333,060 x earth)
 Surface temperature:5,500 degrees Celsius
 Core temperature: 15 million degrees
Celsius
 Distance from earth: 150 million km
Size of the sun compared to some
planets
Different suns
Different sizes of the sun
What do the sun do for us?
 The sun does a lot of things like give
us warmth, vitamin D and heat. We
need all of those things to survive
and to be healthy.
What would happen if the sun
disappeared?
 If the sun disappeared there would be no light or warmth.
 Plants need the sun to grow because they need the
warmth to grow and we need plants like fruits and
vegetables for food.
 The sun gives us vitamin D which our body needs to keep
healthy.
 We need the warmth of the sun because if there is no heat
then everything would freeze and earth would be an ice
land. We need the light because then everything would be
dark so we wont be able to see anything.