1. Start with a Nebula A cloud of gas and dust Formed in the big bang
light years across
Formed in the big bang
H & He gases
Formed from exploding stars
super nova
In July or August of 1054, Chinese astronomers saw and recorded the star's demise. Appearing in the sky above the southern horn of the constellation Taurus was a star the Chinese described as six times brighter than Venus and about as brilliant as the full Moon. The remains of this star were later christened the Crab Nebula, a cloudy, glowing mass of gas and dust about 7,000 light-years away from Earth.
This "guest star," as the Chinese called it, was so bright that people saw it in the sky during the day for almost a month. During that time, the star was blazing with the light of about 400 million suns. The star remained visible in the evening sky for more than a year. In two separate accounts, Chinese astronomers described the star as having pointed rays in all four directions and a reddish-white color.
If the blast had occurred 50 light-years from Earth, astronomers believe that all living things could have been destroyed by radiation. In the nine centuries since, astronomers have witnessed only two comparable cataclysms in our Galaxy: the supernova explosions of 1572 and 1604.
By Chinese accounts, the supernova was a tremendous celestial display. But the Europeans may not have agreed, because astronomers have not found any European records of the event.
Crab nebula, a supernova remnant

2. Nebula Collapses Triggered by a shock wave (another super nova?)
EM attraction causes smallest dust particles to clump
Charged cloud heats, dust solidifies into rock
Rocks collide at random
n triggered star formation, one of several events might occur to compress a molecular cloud and initiate its gravitational collapse. Molecular clouds may collide with each other, or a nearby supernova explosion can be a trigger, sending shocked matter into the cloud at very high speeds.[2] Alternatively, galactic collisions can trigger massive starbursts of star formation as the gas clouds in each galaxy are compressed and agitated by tidal forces
Eagle Nebula
Discovery video

3. Events (shock wave, nova, etc) trigger the nebula collapse
causing increased: gravitational attraction
velocity
temperature

4. Nebula Collapses
Fused particles have more mass; gravity draws them together
accretion
Collapsing cloud spins faster and faster, flattening the accretion disc
Collapse = heating up
Video first – 5 min

5. Accretion Majority of the mass in the middle
Protostar
enough mass, heat, will form a star
Remaining mass accretes into 100’s of planetisimals
Moon-sized

6. Fusion Begins!
When central mass has great gravity, temp, pressure, nuclear fusion begins
H -> He = star
if planets orbit = sun
Force of fusion cleans up the neighborhood
small particles blown away
gases blown off inner planets
Young star jetting out material
Fusion

7. Planets, Asteroids, Dwarf Planets, etc

8. Animated
Discovery video
Fusion

9. Evidence – Ecliptic All revolve (orbit) around sun counterclockwise
Similar eccentricities
Planetary orbits aligned on a disc, the ecliptic
What about Pluto?

10. Evidence – Ecliptic •most rotate on axis counterclockwise
same patterns in moons, asteroids

11. Evidence – Age
If SS formed in the same event, all should be equally old
Meterorites = 4.6 billion yrs old
Earth rocks = 4.3 byo
Sun = 4.6 byo
Age of Moon
Evidence

12. Evidence : Accretion Craters
Earths are few, mostly eroded
Visible on moon
no water cycle
no atmosphere
Meteor Crater, Arizona
Meteor Impact
Earth Reveled #2 7:30-11:30

13. Evidence – Unusual Rock Strata
Iridium anomaly
100x greater concentration of rare element
from asteroid impact?
65mya = corresponds to mass extinction
The term iridium anomaly commonly refers to an unusual abundance of the chemical element iridium in a layer of rock strata, often taken as evidence of an extraterrestrial impact event because of the case of such an anomaly at the Cretaceous–Paleogene boundary (often abbreviated either K-Pg boundary or K–T boundary).
Iridium is a very rare element in the Earth's crust, but is found in anomalously high concentrations (around 100 times greater than normal) in a thin worldwide layer of clay marking the boundary between the Cretaceous and Tertiary periods, 65 million years ago. This boundary is marked by a major extinction event, including that of the dinosaurs along with about 70% of all other species. The

14. Evidence – Planets Inner planets aka terrestrial
hotter at formation
small, rocky solids
dense: g/cc
little atmosphere, few moons
Outer planets aka Jovian
Cooler at formation
gas giants
Low density: g/cc
Thick atmosphere, many moons
Jupiter’s moons orbits

15. What about Pluto?
eccentricity, angle
density
size
rocky core
Pluto?