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Transcript

How Many Stars are in our Solar System????
a. Hundreds
b. Millions
c. Billions
Explain why you chose the answer you picked.

Copy the Sun Notes in your Practice Section.
One star is inside our Solar System –
Sun
The Sun is :
-Medium size
-Yellow
-Dwarf Star
The

Diameter= 1,392,000 km

5 billion years old

Distance from the Sun = 1AU
◦ AU is Astronomical Unit = 149,600,000 km

Corona –
◦ Visible during a total
eclipse appears as a
white colored halo
◦ Corona means crown in
latin
◦ Corona extends into
space for millions of
kilometers
◦ Solar winds are millions
of streams of electrically
charged particles
◦ Visible with only special
equipment
◦ Can extend 10-12 times
the diameter of the sun

Chromosphere –
◦ The middle layer of the suns
atmosphere
◦ It is visible during a total
eclipse
◦ The Greek word Chroma
means color
◦ Below corona
◦ 3,000 km thick
◦ Visible only with special
equipment

Photosphere
◦ First layer of the Sun’s atmosphere
◦ The sun does not have a solid surface, but
instead when you are looking at the sun, you
are looking at the photosphere
◦ The photosphere is considered to be the Sun’s
surface layer.
◦ Visible by naked eye – The Part We See!
◦ 600km thick

Convective Zone
◦ Outermost layer of the sun’s interior
◦ Hot gas rises and then sinks here
◦ The loops formed by sinking cool gas causes
energy to move towards the sun’s surface
◦ Convection currents of suns gases
◦ 200,000 km thick

Radiative Zone
◦ Region of very tightly packed gas where energy
moves mainly in the form of electromagnetic
radiation
◦ It can take energy up to 100,000 years to move
through the radiation zone.
◦ 300,000 km thick
◦ Extremely dense – light takes millions of years to
pass through

Core
◦ First layer in the sun’s interior
◦ Enormous amounts of energy are produced here
through nuclear fusion.
◦ Nuclear fusion is hydrogen atoms join to make
helium atoms
◦ 200,000km thick
◦ 15,000,000°C
-
Just like the Earth, The Sun spins on its axis
The Sun gives off ultraviolet rays
Suns light takes 8 minutes to reach Earth
-
Galileo was the first scientist to explore and
observe the sun
Satellites help us get valuable data from the
sun
Sunspots
◦ are cooler areas on the sun – on the photospere
◦ Can affect the Earths weather

Solar Flare


Giant storms on the suns surface that send huge
electrically charged particles into the Solar System
Prominences
◦ an eruption of a flamelike tongue of relatively cool,
high-density gas from the solar chromosphere into
the corona where it can be seen during a solar
eclipse or by observing strong spectral lines in its
emission spectrum.

Solar Flares
◦ a brief powerful eruption of particles and intense
electromagnetic radiation from the sun's surface,
associated with sunspots and causing disturbances
to radio communication on earth

Solar Winds
◦ from the sun's corona consisting of a flow of
charged particles, mainly electrons and protons,
that interacts with the magnetic field of the earth
and other planetary bodies.


Made of Hydrogen that fuses to Helium
Gravity pulls the sun into the shape of a
sphere.

Assemble the Layer of the Sun Foldable and
place it in the Application Section of your
journal.


Why do you think the Earth stays in orbit
around the sun?
What do you thin would happen if the Earth
was no longer orbiting around the sun?


7 Sentence Summary of what we learned. DO
NOT GIVE A LIST OF OUR AGENDA!!!!!
Include questions you still have of the sun.