Broken links

[selden]

Is this the right place to list broken links?  I tried all the links on your worldbuilders links page, and a few were broken.  

Thanks for testing!

I just now tested the links using Firefox:

This one doesn't seem to load at all; I'm using Windows 10 and Google Chrome.
Gravity Calculator for Astronomical Bodies Based on Radius and Density - An online calculator that allows you to calculate gravity. Remember that materials become compressed in the centre of planets, so large planets are denser than small ones made of the same materials (see Valencia et. al. below).

Loads & works for me using several Firefox variants, including:
Firefox ESR 52.9.0 (64bit)  under Win7.
SeaMonkey v 2.49.3 under Win7 but it complains "Insecure information on this page was blocked."
Waterfox v 55.2.2 (64bit) under Win7.

This one looks like a German news page.
Rassilon's ssc generator A generator that works with Celestia to create realistic systems; it uses John M Dollan's 
Planet Classification list, too.

A backup of the original page is available on Archive.org at
http://web.archive.org/web/2012061213320...z/ssc.html

The backup page seems to work OK with Firefox ESR 52.9.0 (64bit)  under Win7.

This page isn't found at all.
Snaiad An excellent fictional ecology on a very alien world; and the artwork is phenomenal Also see the wiki, here.(SB)

Available on Archive.org at http://web.archive.org/web/2008081500100...terus.html

This does work, but you say it requires Firefox, but it seems to work with Google Chrome.
Instant Planet Generator - Requires Firefox. 

Still works with Firefox, too.

Page not found.  But the rest of her site seems to be active.
The Five foundations of Worldbuilding - Things to ask yourself while creating worlds.

Available on archive.org at http://web.archive.org/web/2014010916332...-building/