Today we’re rounding out our planetary tour with ice giants Uranus and Neptune. Both have small rocky cores, thick mantles of ammonia, water, and methane, and atmospheres that make them look greenish and blue. Uranus has a truly weird rotation and relatively dull weather, while Neptune has clouds and storms whipped by tremendous winds. Both have rings and moons, with Neptune’s Triton probably being a captured iceball that has active geology.

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Table of Contents
Ice Giants With Small Rocky Cores 2:18
Thick Mantles of Ammonia, Water, and Methane 1:53
Atmospheres Makes Them Look Green And Blue 2:53
Uranus Has Dull Weather 3:35
Neptune Has Active Weather 7:19
Both Have Rings And Moons 5:12

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PHOTOS/VIDEOS
Uranus en.wikipedia.org/wiki/Voyager_2#/media/File:Uranus2.jpg [credit: NASA/JPL/Voyager mission]
Neptune www.nasa.gov/content/25-years-ago-voyager-2-captures-images-of-neptune/ [credit: NASA]
King George III en.wikipedia.org/wiki/George_III_of_the_United_Kingdom#/media/File:Allan_Ramsay_-_King_George_III_in_coronation_robes_-_Google_Art_Project.jpg
Uranus from Earth picture by Phil Plait
Uranus, Earth size comparison en.wikipedia.org/wiki/File:Uranus,_Earth_size_comparison.jpg [credit: NASA]
Uranus core, reconstructed from en.wikipedia.org/wiki/File:Uranus-intern-en.png [credit: Wikimedia Commons]
Uranus www.spacetelescope.org/static/archives/images/screen/opo0647b.jpg [credit: NASA, ESA, L. Sromovsky and P. Fry (University of Wisconsin), H. Hammel (Space Science Institute), and K. Rages (SETI Institute)]
Uranus storms www.keckobservatory.org/images/made/images/blog/Uranus_Aug20142_800_407.jpg [credit: Imke de Pater (UC–Berkeley)/Keck Observatory]
Uranus and rings (tilt demonstration) en.wikipedia.org/wiki/Uranus#/media/File:Uranusandrings.jpg [credit: Hubble Space Telescope - NASA Marshall Space Flight Center]
Uranus with rings and moons www.eso.org/public/images/eso0237a/ [credit: ESO]
Miranda en.wikipedia.org/wiki/Moons_of_Uranus#/media/File:Miranda.jpg [credit: NASA]
Verona Rupes apod.nasa.gov/apod/ap110404.html [credit: NASA]
Neptune’s Interior solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=283 [credit: Lunar and Planetary Institute]
Neptune clouds en.wikipedia.org/wiki/File:Neptune_clouds.jpg [credit: NASA]
Neptune’s Great Dark Spot en.wikipedia.org/wiki/Neptune#/media/File:Neptune%27s_Great_Dark_Spot.jpg [credit: NASA / Jet Propulsion Lab]
Neptune’s Rings www.rolfolsenastrophotography.com/Astrophotography/Solar-System/i-vjMHSxz/A [credit: Rolf Wahl Olsen / NASA/JPL (Voyager 2, NASA Planetary Data System)]
Triton en.wikipedia.org/wiki/Triton_(moon)#/media/File:Triton_moon_mosaic_Voyager_2_(large).jpg [credit: NASA / Jet Propulsion Lab / U.S. Geological Survey]
Triton flipped en.wikipedia.org/wiki/File:PIA01538_Triton_flipped_v.jpg [credit: NASA/JPL]
Triton Nitrogen Geysers en.wikipedia.org/wiki/Triton_(moon)#/media/File:Voyager_2_Triton_14bg_r90ccw_colorized.jpg[credit: NASA]

1. Introduction to Astronomy
2. Naked Eye Observations
3. Cycles in the Sky
4. Moon Phases
5. Eclipses
6. Telescopes
7. The Gravity of the Situation
8. Tides
9. Introduction to the Solar System
10. The Sun
11. The Earth
12. The Moon
13. Mercury
14. Venus
15. Mars
16. Jupiter
17. Jupiter's Moons
18. Saturn
19. Uranus & Neptune
20. Asteroids
21. Comets
22. The Oort Cloud
23. Meteors
24. Light
25. Distances
26. Stars
27. Exoplanets
28. Brown Dwarfs
29. Low Mass Stars
30. White Dwarfs & Planetary Nebulae
31. High Mass Stars
32. Neutron Stars
33. Black Holes
34. Binary and Multiple Stars
35. Star Clusters
36. Nebulae
37. The Milky Way
38. Galaxies, part 1
39. Galaxies, part 2
40. Gamma-Ray Bursts
41. Dark Matter
42. The Big Bang, Cosmology part 1
43. Dark Energy, Cosmology part 2
44. A Brief History of the Universe
45. Deep Time
46. Everything, The Universe...And Life
47. Explore The Solar System:

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.