FORMATION OF THE SOLAR SYSTEM Chapter 28.3. Began as a solar nebula  Cloud of gas and dust  4 to 5 billion years ago  Fusion began in center SUN! –Triggered.

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Presentation transcript:

FORMATION OF THE SOLAR SYSTEM Chapter 28.3

Began as a solar nebula  Cloud of gas and dust  4 to 5 billion years ago  Fusion began in center SUN! –Triggered by a nearby supernova? –Sun is 99% of the matter in the SS

Solar nebula

Current dust cloud around a star

Formation of planets  Dust is attracted to other dust making PLANETESIMALS (baby planets)  Planetesimals get larger by their gravitational pull attracting more matter creating PLANETS  accreation

Formation of planetisimal

Planetesimal forming into a planet

Rings will eventually coalesce to become planets

Formation of planets (cont.)  Heavier elements stayed closer to the sun –Rocky planets –Mercury, Venus, Mars, Earth  Lighter elements went farther from sun –Gas planets –Jupiter, Saturn, Uranus, Neptune

Leftovers at the outer edge of the SS  Kuiper belt  Oort cloud

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