Ch 25 5 solar system formation
This presentation is the property of its rightful owner.
Sponsored Links
1 / 8

CH 25.5 Solar System Formation PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on
  • Presentation posted in: General

CH 25.5 Solar System Formation. Objectives: How did our solar system form? What evidence supports our ideas?. http://atropos.as.arizona.edu/aiz/teaching/nats102/mario/solar_system.html. Nebula Theory. The solar system formed fr om a cloud of dust and gas (nebula). 4.6 billion years ago

Download Presentation

CH 25.5 Solar System Formation

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Ch 25 5 solar system formation

CH 25.5 Solar System Formation

Objectives:

How did our solar system form?

What evidence supports our ideas?

http://atropos.as.arizona.edu/aiz/teaching/nats102/mario/solar_system.html


Nebula theory

Nebula Theory

The solar system formed froma cloud of dust and gas (nebula).

4.6 billion years ago

Nebula produced by the explosion of a previous star.


Protoplanetary disk

Protoplanetary Disk

Protoplanetary disk forms when gravity pulls particles and gas to the center.

Disk begins to spin (possibly because of a shock wave from a “nearby” supernova.

Gravity continues to contract the cloud to the center – making it spin faster (angular momentum … think ice skaters spinning)

Protosunat center  Sun when temperatures reach millions of degrees and NUCLEAR FUSION BEGINS.

Nuclear fusion combines hydrogen atoms together to make helium and releases LOTS of ENERGY! Stars begin to shine!

http://atropos.as.arizona.edu/aiz/teaching/nats102/mario/solar_system.html


Planets grow by accretion

Planets Grow by Accretion

Accretion: Growth by colliding and sticking together

Planetessimals(asteroid size) Protoplanets(moon size) Planets


Inner vs outer

Inner vs. Outer

Inner Solar System = “Rocky” PlanetsHotter  Metals & Rock condense (gas  solid) @ higher temps.

Outer Solar System = “Gas” Giants

Colder  Light gases like H; He; Ammonia; Methane; Water condense (gas  solid ice crystals) @ cold temps.


Evidence to support

Evidence to Support

Sun is 99.9% of mass – in center.

Planets all orbit in same plane.

Planets orbit in same direction.


Summary

Summary


Extra solar solar systems

Extra-solar solar systems


  • Login