«Breaking News» Tiny galaxy 30 million light-years away could be a 'living fossil' from the early universe

Astronomers have stumbled upon a previously-unnoticed dwarf galaxy in our ‘cosmic backyard.’

A team using the Hubble Space Telescope initially set out to determine the age of a globular cluster by measuring its faintest stars.

But in doing that, they discovered a small galaxy measuring just 3,000 light-years at its widest point.

According to the experts, the faint galaxy could be around 13 billion years old – making it almost as old as the universe itself.

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Astronomers have stumbled upon a previously-unnoticed dwarf galaxy in our ‘cosmic backyard.’ The team has since dubbed it Bedin 1 (seen in the denser cluster of stars above)

The newly discovered galaxy was spotted in the globular cluster NGC 6752.

The team has since dubbed it Bedin 1.

Spheroidal dwarf galaxies such as Bedin 1 are a relatively common sight throughout the universe – but, the new galaxy discovered on the outer fringes of Hubble’s Advanced Camera for Surveys stands out from the rest.

Though it’s estimated to be about 13 billion years old, it appears to have had little interaction with other galaxies.

‘While dwarf spheroidal galaxies are not uncommon, Bedin 1 has some notable features,’ according to the Hubble team.

A team using the Hubble Space Telescope initially set out to determine the age of a globular cluster by measuring its faintest stars. But in doing that, they discovered a small galaxy measuring just 3,000 light-years at its widest point

‘Not only is it one of just a few dwarf spheroidals that have a well-established distance but it is also extremely isolated.

‘It lies about 30 million light-years from the Milky Way and 2 million light-years from the nearest plausible large galaxy host, NG 6744.

‘This makes it possible the most isolated small dwarf galaxy discovered to date.’

Bedin 1 is extremely faint, according to the Hubble team, and only measures 3,000 light-years across at most.

WHAT IS THE HUBBLE SPACE TELESCOPE?

The Hubble telescope was launched on April 24, 1990, via the space shuttle Discovery from Kennedy Space Centre in Florida.

It is named after famed astronomer Edwin Hubble who was born in Missouri in 1889.

He is arguably most famous for discovering that the universe is expanding and the rate at which is does so - now coined the Hubble constant. 

Hubble has made more than 1.3 million observations since its mission began in 1990 and helped publish more than 15,000 scientific papers.

The Hubble telescope is named after Edwin Hubble who was responsible for coming up with the Hubble constant and is one of the greatest astronomers of all-time

It orbits Earth at a speed of about 17,000 mph in low Earth orbit at about 340 miles in altitude.

Hubble has the pointing accuracy of .007 arc seconds, which is like being able to shine a laser beam focused on Franklin D. Roosevelt's head on a dime roughly 200 miles away.

Hubble's primary mirror is 2.4 meters (7 feet, 10.5 inches) across and in total is 13.3 meters (43.5 feet) long - the length of a large school bus.

There are 36 other known dwarf spheroidal galaxies in the Local Group of Galaxies, and 22 alone are satellites of the Milky Way.

The latest, however, appears to have existed mostly in isolation since the days of the early universe.

‘The discovery of Bedin 1 was a truly serendipitous find,’ the Hubble team says.

‘Very few Hubble images allow such faint objects to be seen, and they cover only a small area of the sky.’

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https://hienalouca.com/2019/02/01/tiny-galaxy-30-million-light-years-away-could-be-a-living-fossil-from-the-early-universe/
Main photo article Astronomers have stumbled upon a previously-unnoticed dwarf galaxy in our ‘cosmic backyard.’
A team using the Hubble Space Telescope initially set out to determine the age of a globular cluster by measuring its faintest stars.
But in doing that, they discovered a small galaxy measuring just 3,0...

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