Asteroids - o outer gap would have objects with orbital...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Asteroids Here is a link to good information and pictures on Asteroids:  http://www.planetscapes.com/solar/eng/asteroid.htm Link to Sky and Telescope magazine's asteroid page:  http://www.skypub.com/sights/asteroids/asteroids.shtml   chunks of rocks (planetisimals ?) o Figure 10.5 shows photographs of asteroids  [Link to Figure 10.5] generally small o most less than 1 km across o largest is about 1000 km across over 100,000 of them total mass of all asteroids is very small o much less than the mass of a planet composition: o silicates o carbon o metals most located in "asteroid belt" between Mars and Jupiter Asteroid Belt: Figure 10.4 shows a drawing of the asteroid belt.  [Link to Figure 10.4]
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
  gaps in asteroid belt from orbital resonances o inner gap would have objects with orbital period = 1/3 period of Jupiter
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o outer gap would have objects with orbital period = 1/2 period of Jupiter o Figure 10.7 shows a graph of the number of asteroids at each distance [Link to Figure 10.7] • orbits are not perfect circles (are ellipses) o so some asteroids are found in the gaps as they pass through Jupiter's gravity removed other material from this area and kept materials from collecting into a planet Other Asteroids: Trojan asteroids - trapped in Jupiter's orbit by balance of gravity from Sun and Jupiter Amor asteroids - orbit the Sun but cross the orbit of Mars Apollo asteroids - orbit the Sun but cross the orbit of Earth • could collide with Earth (several near misses) • collision 65 million years ago may have caused extinction of dinosaurs...
View Full Document

This note was uploaded on 03/09/2012 for the course AST 1002 taught by Professor Emilyhoward during the Spring '10 term at Broward College.

Page1 / 3

Asteroids - o outer gap would have objects with orbital...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online