OUR SUNOUR SUN
OUR SUNOUR SUN
Solar Nebula:- Cloud of gas and dust that developed into the solar system.- Our Sun was developed as a star from the burning of Hydrogen gas.
Nebular Theory- Accepted idea that the sun and the planets condensed out of a spinning cloud of gas and dust.
OUR SUNOUR SUN
WORK ON:- Objectives 4.02 + 4.03
- Begins on page 571 of your book
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OUR SUN
Core Hydrogen fusion H + H → He + energy
Radiative Zone Radiative Zone Energy travels
outward from core along electromagnetic (EM) radiation
R-M-I-V-U-X-G “Random
walk” of photons
CONVECTIVE ZONE Convectio
n currents
Hot gases rise to surface, cooler gases sink
PhotospherePhotosphere Solar
surface Granular
texture Sunspots
appear
Granulation Clip
ChromosphereChromosphere
Solar atmosphere
Solar storm activity observed
Chromosphere
CORONA
“Crown” Seen only during
solar eclipses Heated by
magnetic field Solar wind
The SUN Explained (further)
Please take out your SUN Objective notes
Atomic Structure of Sun’s Core
Hydrogen Atoms (H) splitting to Helium (He) Atoms Causes a great amount of energy
See 5 step process in book page 572
5-step process of Nuclear Fusion
Sunspots
Cool, dark areas of gas within the photosphere.
Caused by powerful magnetic fields. Slows down convection currents to the
Photosphere, causing a cooling of certain areas of the surface.
Solar Prominence:
- Cloud of glowing gases that arches high above sun’s surface.
Granulation
caused by the convection, or `bubbling' of the sun.
Solar wind Ions are so hot,
gravity can’t hold them onto the sun
Solar flare Violent eruptions of plasma and EM photons
Solar Flare
Coronal Mass Ejection
Massive burst of Solar Wind (above the Corona) being released into Space.
Solar Storms and Aurora’s on Earth
AURORAS(Northern lights)
Aurora Borealis
Northwest Territories, Canada
MENOMINEE, MI (OCT 11,2001)
FINLAND (OCT 1, 2001)
Aurora over Lake Superior
AURORA BOREALIS
Michigan
Solar activity gets ejected from the sun, Solar Winds carry them through space (towards Earth and other planets), Earth’s Magnetosphere protects the earth by diverting solar winds to the North + South poles, as a result we see Aurora’s (Northern/Southern Lights)
DAILY SOLAR FORECASTS
Describe the Sunspot cycleDescribe the Sunspot cycle
Sunspot (Solar Cycle) 11 Year cycle Max to Max (min to
min) = 11 years Last Max = 2008
Influences solar activity heading towards Earth (more Aurora’s)
Go to your LAB GROUPS Sun Review
Use p. 571 of your book for help.