Why are Uranus and Neptune called 'Ice Giants'?
Channel: Jonti Horner
Date: 2020-01-29

A question from curious kid Alex, who asks 'Why are Uranus and Neptune called "Ice Giants"?'

Do you have a question? Feel free to tweet to me @JontiHorner, or to e-mail the question to me at AskJonti@gmail.com

Background images: 

1. Uranus and Neptune, as seen by Voyager 2 
https://commons.wikimedia.org/wiki/File:Uranus%26Neptune.png
Author: Two photos from NASA; combined by Wikipedia/겸216
Licensing: Public Domain (images) / Creative Commons Share Alike 4.0 (composite)

2. Artist's impression of a baby star surrounded by a protoplanetary disk
https://commons.wikimedia.org/wiki/File:Artist%E2%80%99s_Impression_of_a_Baby_Star_Still_Surrounded_by_a_Protoplanetary_Disc.jpg
Author: ESO/L. Calçada
Licensing: Creative Commons Attribution 4.0

3. Giant planets in a cleared gap in a protoplanetary disk
https://www.jpl.nasa.gov/news/news.php?feature=927
Author: NASA/JPL-Caltech
Licensing: Public Domain

4.  The interiors of the gas and ice giants
https://commons.wikimedia.org/wiki/File:Gas_Giant_Interiors.jpg
Author: NASA/Lunar and Planetary Institute
Licensing: Public Domain