Although the largest, Andromeda may not be the most massive.

This galaxy is one of the most massive in the local Universe.

Or are they just trying to claim control over the narrative of the last century's most massive brutality?

Observers stated that he was the most massive human being they'd ever seen.

It is the most massive of the six proposed planets in the system.

It is the most massive of the known dwarf planets.

Some of the most massive and expensive engineering projects in history have involved building bridges.

This planet is one of the most massive found around a red dwarf star.

There's going to be an earthquake, one of the most massive ever recorded.

It is one of the most massive black holes on record.