Transcript The Sun - rosedalegrade9astronomy

The Sun
– Is our nearest star. It is 5 billion
years old.
– It will last another 5 billion years
– Has the mass of more than 300
000 Earths
– So big that gravity forces
everything together so tight that
there are nuclear reactions and
a great amount of heat.
-Hydrogen atoms are squashed
together to form helium (a nuclear
fusion reaction).
The Sun
Corona
Solar
Flare
Chromosphere
Moving
Gases
Core
Solar
Prominence
Sunspot
Photosphere
Interactions of Earth and Sun
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Our distance from the sun is just
right for light – it’s not too hot or
too cold.
Solar wind – high energy particles
– these are DEADLY!!!!
Earth is like a big magnet – the
force around the EARTH is called
the MAGNETOSPHERE
Both the magnetosphere and
atmosphere protect us from the
Sun’s Radiation
When solar winds react with
nitrogen and oxygen at the Earth’s
poles, we get the AURORA – the
NORTHERN LIGHTS or
SOUTHERN LIGHTS.
http://www.designer-daily.com/northern-lights-by-norio-matsumoto-756
Aurora Borealis (Northern Lights)
Interactions of Earth and Sun
• Energy emitted by the Sun:
• Stars and other celestial
objects emit energy consisting
of electromagnetic waves that
travel at the speed of light,
known as electromagnetic
radiation.
• Most of the Sun’s energy will
be absorbed by the Earth’s
atmosphere, but some will be
reflected back into space.
Aurora Borealis (Northern Lights)
The Atmosphere Allows for LIFE
– Our atmosphere
traps heat from the
Sun (otherwise it
would be VERY
cold!)
– Ozone layer protects
us from UV rays
from the sun
(otherwise we would
all get sunburn!)
http://www.kidsgeo.com/geography-for-kids/0040-introduction-to-ouratmosphere.php