Transcript FORMATION OF THE SOLAR SYSTEM

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