a

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a really random, somewhat sketchy stargazers slid
e show
dave
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Contents

• shoemaker-levy 9
• radios
• spectra and applications
• black holes
• red shift
• other stuff

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comet shoemaker-levy 9s collision with jupiter
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the comet fragments spreading out due to
Jupiters rapidly increasing gravitational field
prior to collision
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the collision breeds terrific and lasting storms
with no solid windbreaks to prevent them
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The simplest decent radio. This one uses a
variable-length coil of wire for tuning. A
variable resistor can also be used its smaller,
but the equations are more complicated.
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Conclusion Frequency One by two pi root LC.
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star
meter sticks
grating plastic with small, evenly-spaced holes.
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H
He

N
we can determine what a star is made of by
looking at its spectrum.
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A black hole resides at the centre of this galaxy.
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also this one.
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• Conclusion
• If an object has more mass than its radius(light
  speed2)/G, no light created at the surface will
  be able to escape.
• We can measure masses by looking at spectral
  lines, but the techniques not very accurate.

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we can also tell about the atomic structure of
the atom that emitted the light.
Ehnu
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We can also figure out an objects speed based
on how much the wavelength of light that it emits
differs from what we expect.
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We can predict that the universe is expanding
based on spectra We know the distance to
various stars because their brightness drops off
with distance2. We can also see that the
farthest stars have the highest redshift. This
is only possible in an expanding universe.
The farthest stars are moving most quickly away,
just like the raisins in rising bread.
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Object Data This wide-field image is centered on
the Cygnus region of the northern Milky Way
galaxy and extends from northern Cygnus down to
Vulpecula in the south. To the north are several
prominent gas emission regions, characterised by
the pinkish glow from a mixture of ionized
Hydrogen and Oxygen gases. The most prominent
region in the north is NGC 7000 (North America
Nebula) and to the south-west of this is the
extended emission region called IC 1318, the most
prominent part of which is the Butterfly Nebula
(look for the Butterfly wings). Many other
noteworthy objects are captured in the field of
this image, some of them too small to be seen
easily. However the Veil Nebula stands out
clearly directly to the south of the North
America Nebula. Some others are visible if you
know where to look - for example the Crescent
Nebula (NGC 6888) and down in the south the
Dumbbell Nebula (M27), though at this scale the
Dumbbell looks just like another star. It is
quite fun to compare this image against a star
mapping program such as Megastar or The Sky.
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END