Universe

Older galaxies Astronomical digital images

Older galaxies Astronomical digital images

The Hubble Space Telescope has managed to photograph images of the oldest galaxies that had been observed so far. These are seven primitive galaxies that originated more than 13,000 million years ago, between 350 and 600 million years after the Big Bang. At that time the Universe was 4 percent of its current age. The objective of this study is to know what happened just after the birth of the Universe, which scientists estimate was formed 13.7 billion years ago.

To make these images the Hubble telescope depended on the severity of a nearby group of hundreds of galaxies called Abell 2744, in order to bend the light of the farthest and oldest galaxies. This curvature effect concentrates the light of the ancient galaxies, making them appear up to 20 times larger. The problem is that this effect also distorts galaxies. Scientists can calculate the distortion produced by the gravitational effect and digitally reconstruct the image of galaxies.

Special filters were used to calculate the redshift of galaxies. From these displacements the researchers were able to measure the distance of each galaxy, revealing its true age.

These photos of ancient galaxies show an interesting vision of the birth of the first stars, and offer experts the chance to discover how galaxies like the Milky Way were born, and how stars like our Sun ended up inside it.

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