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The Sun is really a star. It is
the closest one to earth. It is about 150
million Km. away. The Sun is the center of
our solar system. All the planets revolve around it.
Although it has a
diameter of about 1.3 million kilometers, the Sun is only a medium
star. It is known as a yellow dwarf. The Sun is part of the Milky
Way galaxy. Scientists believe it is just a bit older than Earth,
about 4.6 billion years.
The Sun is made up
of several layers. It has a core. Next is the radiation zone. Above
that is the convection zone. The "surface" of the sun is called the
photosphere. Above the surface are two layers of gas. They are
called the chromosphere and the corona.
There is no real surface on the Sun. It is made of
gas, much the same way a cloud is made of water vapor. Although a
cloud looks solid against the sky, it really isn't. You can't touch
it or rest on it. The Sun is much the same way. It only looks solid
against the sky as we view it from so far away. |
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