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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 the sun elements stayed closer to – Rocky planets – Mercury, Venus, Mars, Earth Lighter sun elements went farther from – Gas planets – Jupiter, Saturn, Uranus, Neptune Leftovers at the outer edge of the SS Kuiper belt Oort cloud
