Goo

Goo #8739B (also known simply as Goo) is a planetoid composed almost entirely of a sticky gum-like substance. It's used as a Garbage Disposal of sorts, and has apparent connections to the Junkions. You can move through it easily enough... but getting out of it is another matter altogether.

History
Goo is patrolled by alien garbage trucks that capture and dismantle any junk caught on its sticky surface. The 'goo' can be shut off by deactivating the energy fields that keep it warm and sticky. The control facilities also contain means of long-distance communications. Goo #8739B is the location of a Junkion Command outpost.

When the Junkion Command outpost was destroyed by unknown means in 2012, Wreck-Gar, Kup, Blurr, Grimlock, Wheelie and Sky Lynx went to investigate, making sure to shut off the force fields in advance. After finding a whole bunch of similarly broken things on the planet, Kup told his companions that this was the work of death crystals, and seconds later the entire group was attacked by Blast Off and Runamuck, the latter firing the aforementioned crystals at them. The Autobots immediately retreated from the planet.