A Solar System is Born 4/25/14

• IN: What do you think the planets are made of?

19-1a pgs. 510-514

• Solar System – composed of the sun (a star) and the planets and other bodies that travel around the sun.

• Nebulas – a large cloud of dust and gas in interstellar space.–the location of star formation

Horsehead

Nebula

Omega

Nebula

Cat’s Eye

Nebula

Aquila

Nebula

• Solar Nebula – the name of the nebula that formed our solar system.

• Planetesimals – the tiny building blocks of the planets that formed as dust particles stuck together and grew in size.

Planetesimals to Planets

Orion

Nebula

• Hubble image of protoplanetary discs in the Orion Nebula, a light-years-wide "stellar nursery" probably very similar to the primordial nebula from which our Sun formed.

• OUT: What role does gravity play in our solar system?

A.

B.

C.

D.