1 / 12

Asteroids, Comets, Meteors ---- and Impacts!

Asteroids, Comets, Meteors ---- and Impacts!. Asteroid belt -- between Mars and Jupiter . Comets -- large chunks of frozen gases and solid particles. Found in Kuiper belt and Oort Cloud .

hayley
Télécharger la présentation

Asteroids, Comets, Meteors ---- and Impacts!

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Asteroids, Comets, Meteors ---- and Impacts! Asteroid belt -- between Mars and Jupiter

  2. Comets -- large chunks of frozen gases and solid particles Found in Kuiper belt and Oort Cloud Due to perturbation of orbit, enter inner part of solar system , UV from Sun ionizes the frozen gases, and they fluoresce. Tail made up of glowing gases and solid particles that reflect sunlight.

  3. Historically comets have been viewed as good and bad omens Halley’s comet 1911

  4. Hale-Bopp Comet Wild 2 Composition: hydrogen, carbon & nitrogen compounds

  5. Recurrent comets Halley’s comet -- Sir Edmund Halley using Newton’s laws calculated orbit of comet of 1682, suggested it was same as previous comets and predicted return in 1758 -- 76 yr period Giotto 1986

  6. Meteor showers -- when Earth intersects debris from existing or extinct comet -- named for constellation the meteors appear to radiate Leonids – Nov. – Tempel-Tuttle Perseids – Aug – Swift-Tuttle

  7. Meteors, Meteors, and Meteorites Small solid particles, dust grains, rocks enter atmosphere everyday, most disintegrate, burn up due to friction -- “shooting star” -- meteor Occasionally survive passage -- meteorite

  8. A close encounter

  9. Impacts ! Barringer Crater

  10. The K-T event -- 65 million years ago Iridium layer, Chicxulb crater in Yucatan 100 – 200 km diameter ,  10 km asteroid or comet 75% extinction Tunguska event 1908 in Siberia Small asteroid ~ 40m London

  11. Comet Shoemaker – Levy 9 (SL9) 1994 impacts Jupiter

More Related