Databases

Ozone depleting substances

Stellar Temperatures

Mineral Composition Database - over 1000 minerals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

High-density elements

Superconductors

Terraforming glossary

Elements as prime numbers

Hipparcos and Tycho catalogues download

Asteroids by name and class (.xls)