space science 2
TRANSCRIPT
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18-Apr-13
IESO
Space Science
Part 1
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Influence of Solar surface activities
to Earth
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The Sun appears white to us
but it
radiates in all
wavelengths
(visible and
nonvisiblecolors)
The electromagnetic spectrum
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The Sun in Another Light
QuickTime and a
YUV420 codec decompressorare needed to s ee this picture.
Extreme Ultraviolet image of the Sun at 195 Angstroms
Visible Light has wavelengths between 4000 and 7000 Angstroms
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Plasma emission
traces out magnetic
fields in the solarcorona
QuickTime an d a
Cinepak decompressorare needed to see this picture.
Seeing Magnetic Field
lines
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Solar prominence dwarfs Earthin size
Huge flare of 28 October 2003
Common during the Sunsactive periods
QuickTime and a
YUV420 codec decompressorare needed to see t his picture.
Solar Eruptions
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The 11 year
sunspot cycle
A regular cycle of sunspot numbersover the past 300 years.
The amount of
magnetic activity
on the Sun varies
in an 11 year cycle.
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Dramatic changes occur during the
solar cycle
X-ray and magnetic activitycompared
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Explosions on the Sun
(Coronal Mass Ejections) A billion tons of hot gas
being launched from the
Sun.
White circle in image indicates size and
location of Sun, which is blocked by a
metal disk in the instrument.
Coronagraphs-
Artificial Eclipses
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A solar wind streams into the solar
system and shapes Earths
magnetosphere
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The Sun generates Space
Weather in our solar system
Solar activity can have a dramatic impact on
communications, satellites, and astronauts.
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Solar activity causes colorful
aurorae
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Space Weather
affects the Moonand other planets
we hope to explore.
Mars
Auroraeon
Neptune,
Saturn,
and
Jupiter