Largest-ever galaxy proto-supercluster ‘Hyperion’ spotted

A team of scientists at the European Southern Observatory (ESO) has sited the most massive structure in the early universe known to date.

The astronomers, led by Olga Cucciati of Bologna’s National Astrophysics Institute, found this galaxy proto-supercluster — Hyperion — using new measurements made by the visible multi-object spectrograph of ESO’s Very Large Telescope and pouring over vast arrays of archive data, Efe reported on Wednesday.

“This is the first time that such a large structure has been identified at such a high redshift, just over two billion years after the Big Bang,” Cucciati explained in the discovery paper.

“Normally, these kinds of structures are known at lower redshifts, which means when the universe has had much more time to evolve and construct such huge things,” she added. “It was a surprise to see something this evolved when the Universe was relatively young!”

The VIMOS, an instrument that measures objects at a distance of billions of light years away, in practice allows experts to see what the early universe was like in the distant cosmic past.

Hyperion’s unimaginably enormous mass is estimated to be a million billion times that of our own Sun (which is approximately 1,048 Jupiters, or 333,000 Earths).

“Understanding Hyperion and how it compares to similar recent structures can give insights into how the universe developed in the past and will evolve into the future, and allows us the opportunity to challenge some models of supercluster formation,” Cucciati said.

“Unearthing this cosmic titan helps uncover the history of these large-scale structures,” Cucciati added.

In Ancient Greek mythology, Hyperion was a colossal titan who fathered Helios, the Sun.