Asteroids 
Asteroids
by Crash Course
Video Lecture 20 of 47
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Views: 622
Date Added: August 11, 2016

Lecture Description

Now that we’ve finished our tour of the planets, we’re headed back to the asteroid belt. Asteroids are chunks of rock, metal, or both that were once part of smallish planets but were destroyed after collisions. Most orbit the Sun between Mars and Jupiter, but some get near the Earth. The biggest, Ceres is far smaller than the Moon but still big enough to be round and have undergone differentiation.

CORRECTION: In the episode we say that 2010 TK7 is 800 km away. However, 2010 TK7 stays on average 150 million kilometers from Earth, but that can vary wildly.
Sorry about that!

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Table of Contents
Asteroids Are Chunks of Rock, Metal, or Both 1:45
Most Orbit the Sun Between Mars and Jupiter 7:16
Ceres is Far Smaller Than the Moon, But Large Enough to be Round 3:43

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PHOTOS/VIDEOS
Timelapse of Asteroid 2004 FH's flyby en.wikipedia.org/wiki/File:Asteroid_2004_FH.gif [credit: NASA/JPL Public Domain]
Asteroid Discovery Video www.youtube.com/watch?v=2k2vkLEE4ko [credit: Scott Manley - [email protected]]
Inner Solar System en.wikipedia.org/wiki/File:InnerSolarSystem-en.png [credit: Wikimedia Commons]
Kirkwood gaps commons.wikimedia.org/wiki/File:Kirkwood-gaps-as-disk.png [credit: Wikimedia Commons]
Ceres, Earth & Moon size comparison en.wikipedia.org/wiki/File:Ceres,_Earth_%26_Moon_size_comparison.jpg [credit: NASA]
Dawn Glimpses Ceres’ North Pole www.jpl.nasa.gov/news/news.php?release=2015-133 [credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA]
Ceres cutaway commons.wikimedia.org/wiki/File:Ceres_Cutaway.jpg [credit: NASA, ESA, and A. Feild (STScI)]
Bright Spot on Ceres Has Dimmer Companion www.jpl.nasa.gov/spaceimages/details.php?id=PIA19185 [credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA]
Vesta en.wikipedia.org/wiki/4_Vesta#/media/File:Vesta_full_mosaic.jpg [credit: NASA/JPL-Caltech/UCAL/MPS/DLR/IDA]
Lutetia en.wikipedia.org/wiki/21_Lutetia#/media/File:Lutetia_closest_approach_(Rosetta).jpg [credit: ESA]
Gaspra commons.wikimedia.org/wiki/File:Galileo_Gaspra_Mosaic.jpg [credit: NASA]
Steins neo.ssa.esa.int/image/image_gallery?uuid=db747cf5-9d21-405e-bcdb-e70fe475edc9&groupId=10157&t=1340734455649 [credit: ESA/Osiris]
Mathilde neo.jpl.nasa.gov/images/mathilde1.jpg [credit: NEAR Spacecraft Team, JHUAPL, NASA]
Ida en.wikipedia.org/wiki/243_Ida#/media/File:243_ida_crop.jpg [credit: NASA/JPL]
Kleopatra apod.nasa.gov/apod/ap000510.html [credit: Stephen Ostro et al. (JPL), Arecibo Radio Telescope, NSF, NASA]
An artist's conception of two Pluto-sized dwarf planets in a collision around Vega. en.wikipedia.org/wiki/Methods_of_detecting_exoplanets#/media/File:Massive_Smash-Up_at_Vega.jpg [credit: NASA/JPL-Caltech/T. Pyle (SSC)]
Itokawa apod.nasa.gov/apod/ap140209.html [credit: ISAS, JAXA]
An artist's illustration showing two asteroid belts and a planet orbiting Epsilon Eridani en.wikipedia.org/wiki/Epsilon_Eridani#/media/File:NASA-JPL-Caltech_-_Double_the_Rubble_(PIA11375)_(pd).jpg [credit: NASA/JPL-Caltech]
Near-Earth Asteroids www.jpl.nasa.gov/images/asteroid/20130204/asteroid20130204-full.jpg [credit: NASA/JPL-Caltech]
Lagrange Points Diagram en.wikipedia.org/wiki/Trojan_(astronomy)#/media/File:Lagrange_very_massive.svg [credit: Wikimedia Commons]
TK7 en.wikipedia.org/wiki/2010_TK7#/media/File:PIA14405-full_crop.jpg [credit: NASA/JPL-Caltech/UCLA]
165347 Philplait www.slate.com/content/dam/slate/blogs/bad_astronomy/2014/01/20/asteroidphilplait_panstarrs.jpg.CROP.original-original.jpg [credit: Larry Denneau/Pan-STARRS via Amy Mainzer]

Course Index

Course Description

In this Crash Course series, marvel at the wonders of astronomy with your host for this intergalactic adventure, the Bad Astronomer himself -- Phil Plait. In just 40 short lessons, you will learn the basics of the oldest science known to humanity.

Be sure to check out links to relevant Photos in the description for each video.

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