On tf.wiki isnt much information, can someone explain it better ? for example what kind of star is Hadeen ?? Is it a blue star, a red star ?? Or discriptions about the planets, trush appears to be very hot. Dread seems to be quite mountainous and is cybertrons neighboor. Thusla Doom is a Gas Giant. Then there is a ottroplis and an Autobot Mausoleum. But whats with the other planets ?? Would like to get some new infos about the Hadeen system.
This system is something that looks like it was just made up for the Almanac, so there may not be any more information out there regarding it. I can tell you the Thulsa Doom planet and its various moons are all named after Conan: The Barbarian villains, though. The word hadeen may have links to Hades, greek god of the underworld and the invisible (robots in disguise?), as well, which would explain the mausoleum.
If it's the tfwiki, take it with a grain of salt. This is the same people who think that G1 Thundercracker randomly yelling "NAZGHUULL!!" counts as comedy.
I created most of those pages, and everything was taken from information retrived from the Allspark Almanac. That was all that was there. Some were deleted simply because there wasn't enough information.