Download Formation of a Solar System • • • The Solar Nebula Theory 1. Nebula

Formation of a Solar System
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The Solar Nebula Theory
1. Nebula
2. Gravitational Force
3. Rotational Force
4. Shrinking Nebula
5. Flattened Nebula
6. Solar system
Formation of a Solar System
• The theory of how stars and planets form
is called the solar nebula theory.
• The Sun is calculated to be 5 billion years
old
• The Earth is calculated to be 4.6 billion
years old
The Solar Nebula Theory
1. Nebula
Cloud of dust and gas
2. Gravitational Force
outer regions of cloud
pull towards middle
3. Rotational Force
random motion combined
with gravity produce a
rotation of the cloud
4. Shrinking Nebula
As mass accumulates
the rotation increases
5. Flattened Nebula
Central sphere is a star
surrounded by a wide
disk of dust and gas
6. Solar system
The orbiting disk of dust
is in clumps, each clump
will accumulate more
mass as gravity works
Extra Solar Planets
• Planets are essentially by-products of star
formation.
• Therefore each star in the sky may be the
centre of its own solar system.
Answer #1-4 from page 227.
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4.
What is the estimated age of the universe?
How does the Big Bang Theory explain an expanding universe?
How could you use all the students in your class to model the
expanding universe?
What force is responsible for bringing together particles in space?