Photo: Hubble

Hubble Space Telescope May Have Discovered How Galaxies Evolve

By - Staff Writer
Jun 22, 2017 4:01pm AST
Hubble Find May Show How Dead Galaxies Evolve
Photo: Hubble

A galaxy that the Hubble Space Telescope has been fixated on may have shed some new light on how dead galaxies evolve, according to some new reports. Photographed by the Hubble Space Telescope, the galaxy stopped producing new stars just a few billion years after the Big Bang, making it what’s known as a Dead Galaxy.

Sune Toft of the University of Copenhagen, who was part of the team that made the discovery, delivered a report in the scientific journal Nature, and said that the Hubble photos provide some interesting new data about Dead Galaxies. As Mr. Toft says:

“This new insight may force us to rethink the whole cosmological context of how galaxies burn out early on and evolve into local elliptical-shaped galaxies. Perhaps we have been blind to the fact that early ‘dead’ galaxies could in fact be disks, simply because we haven’t been able to resolve them.”

According to the Hubble researchers, this Dead Galaxy is three times the mass of the Milky Way – our galaxy – but only half its size. The Hubble team also seem to insinuate that galaxies merging together is what may cause the evolution into eliptical galaxies. As Mr. Toft says:

“If these galaxies grow through merging with minor companions, and these minor companions come in large numbers and from all sorts of different angles onto the galaxy, this would eventually randomize the orbits of stars in the galaxies.”

In the Nature report – which you can find here – Mr. Toft and his team claim that it is the first that that scientists have managed to see a galaxy evolve from a disk-shaped spiral galaxy into a more three-dimensional elliptical galaxy, the more common shape for old-star and dead galaxies. While there’s still much to learn about how Dead Galaxies form – and why they die in the first place – it’s definitely a major step forward for researchers.

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