Page 17 - Karan Yadav - MYP Year 1 Physical Science Booklet

Photosphere - This is the Sun’s deepest layer, and the layer visible to
human eyes directly from the Earth. It is also called the solar surface.

Much of this layer is covered by granulation. Photosphere's
temperature varies from roughly 6500 degrees Kelvin at the bottom of
it to 4000 degrees Kelvin to the top.

Chromosphere - This layer of the Sun is located between 250 miles and

1300 miles above the photosphere. The chromosphere has
temperatures around 4000 degrees Kelvin at the base, and 8000
degrees Kelvin at the top.

Corona - This layer is the Sun’s outermost layer. It starts at roughly

1300 miles over the photosphere and it has no upper limit. Its
temperature is between 500,000 degrees Kelvin to 1 million degrees
Kelvin. The corona cannot be seen with bare eyes, but during a total
solar eclipse one can use a coronagraph telescope to view it.

Mercury - Mercury is the smallest and innermost planet
in the Solar System. Its orbit around the Sun takes only
87.97 days, the shortest of all the planets in the Solar

System. The second hottest planet in the solar system
and one day on Mercury is 58d 15h 30m. Most cratered
planet in the solar system. Mercury is the second
densest planet. It is 57.91 million km from the sun.

Venus - Venus is the second planet from the Sun. It is
named after the Roman goddess of love and beauty. As
the second-brightest natural object in the night sky

after the Moon, Venus can cast shadows and, rarely, is

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