The net effect is that:
the number of rings in the Cassini division is greatly reduced.
How was U discovered?
William Hershel discovered it accidentally while working on a star-mapping
first planet discovered using a telescope.
Accordingly, astronomers think that Saturn also has a rocky core, perhaps as
much as 15x the core mass of Earth.
Compare /contrast the atmospheres and weather of Saturn and Jupiter, and tell
how the differences affect each planets appearance.
The more massive the star, or the smaller the star, the greater the movement is.
If these wobbles occur in our line of sight, then we see fluctuations in the stars
-which can be measured using the Doppler effect.
Above the clouds lies a layer of haze formed by the action of sunlight on Ss
total thickness of the three cloud layers in Ss atmosphere is roughly 200 km,
compared with about 80 km on J, and each layer is within itself somewhat th
Law 1: The continuous spectrum
A solid, liquid or dense gas excited to emit light will radiate at all wavelengths and
thus produce a continuous spectrum.
Law 2: The emission spectrum
A low-density gas excited to emit light will do so at spe
Energy levels increase > >
Light- Our main information source about the cosmos
Lightelectromagnetic radiationis the only messenger that we can access to learn
about the cosos. You might think that cosmic
S as a whole deficient in helium relative to J?
Y What evidence supports the idea that a relatively recent catastrophic event
was responsible for Ss rings?
rings no more than 50 million years old,
or 100 times younger than the solar system.
There is no direct evidence for such an occurrence, however, and no theory to
tell us how we should seek to confirm it.
What are comets like when they are far from the sun?
What happens when they enter the inner solar system?
Comets are frozen
Describe the various parts of a comet while it is near the sun? see 7.
How do we know what comets are made of?
the light that dust from a comet reflects, as well as gas that emits spectral lines
of hydrogen, nitrogen, carbo
The Big Bang
And in fact about 10 billion years later, a bunch of galactic debris got together and
formed a pre-solar nebula.
This contracted gravitationally forming our star,
-the sun and gave rise to the solar system.
The model is not perfect but it is