Methuselah

Methuselah is a planet near the galactic core in the Beast Wars portion of Generation 1 continuity.

Methuselah dwarfs Protos

Methuselah is an ancient dead world. It was dead even billions of years ago when Primus chose its moon Protos as a prototype for the later Cybertron.

Billions of years later, Methuselah still hides Protos in its shadow.

From Teletraan I: The Transformers Wiki, a Wikia wiki.