Astronomers have discovered a galaxy more than 330 million years old after the Big Bang. It is according to them the galaxy
the farthest ever discovered. For its rather faint light to reach us on earth, it would have traveled 13.5 billion light-years.
The new galaxy in question could be a quaser with a huge, active black hole at its center or a starburst, researchers who have called it HD1 remain skeptical what it really is.
If the second hypothesis is true, then the short time needed for the formation of such a mass is a challenge in the framework of models of formation and evolution of black holes.
For astrophysicist Fabio Pacuccu of the Havard & Smithsonian Center for Astrophysics: “Answering questions about the nature of such a distant source is very difficult”.
“It’s like guessing the nationality of a ship from the flag it flies, while being far ashore, with the ship in the middle of a gale and thick fog. You can can ‑to be able to see certain colors and shapes of the flag, but not in their entirety It is ultimately a long game of analysis and exclusion of implausible scenarios.
It is a priori during an investigation looking for the galaxies of the beginning of the universe that the HD1 galaxy was discovered.
During the investigation, four high-powered infrared and optical telescopes were used, these are the Subaru, Vista, British infrared, and Spitzer space telescopes. The telescopes carried out a total of 12,000 hours of observation to find light in the early universe.
According to astronomer Yuichi Harikane of the University of Tokyo: “It was very difficult to find HD1 among more than 700,000 objects”. billions of light-years away, which gave me a little goosebumps when I found it.”
The color red occurs when a source of light moves away from us and is known as redshift. It is called so because there is an increase in the wavelength of the light. which originates from the source towards the redder side of the electromagnetic spectrum.