UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
Is Pluto a gas or solid planet?
Question Date: 2014-03-01
Answer 1:

Pluto is solid, made up of mostly rock and ice, and actually, Pluto is no longer considered a planet. It was reclassified as a dwarf planet about 8 years ago due mostly to its small size compared to the other 8 planets, and the discovery of several other massive rocky bodies in the solar system that are similar in size or larger than Pluto ( including Eris, Ceres, Haumea and Makemake).

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use