Methuselah

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

Methuselah dwarfs Protos. That's about ALL Methuselah does, actually.

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.