Scientists have unveiled the thought that the Universe might have been much brighter in its beginnings than previously estimated. New data collected by NASA’s Spitzer Space Telescope discovered that a few of the youngest galaxies to form were much brighter than they had thought. The additional light was present because the galaxies were spouting alight quantities of ionizing radiation.
The new research analyzed a few of the Universe’s earliest galaxies which took shape not more than a billion years after the Big Bang or earlier than 13 billion years ago.
The assay discovered that in particular wavelengths of infrared light, the brightness that comes from the stars was much vivid than previously thought. This research was the first time that scientists had observed the occurrence in a large sample of various galaxies, revealing that some galaxies did not reflect the light, but that the mediocre galaxies were much lighter than those existing today.
The period of formation of the first heavenly bodies is still unknown, but the until-now-evidence that has been found implies that the earliest starts begin to light on approximately 100 or 200 million years after the Big Bang, as the hydrogen element which was present in the Universe started to merge with the stars.
NASA’s Spitzer Space Telescope shed more light on how the Universe was after Big Bang
After approximately a billion years, the cosmos was sparkling with the beautiful lights we now see with the naked eye, and the Universe forever changed as the neutral hydrogen element that has been existing all over has vanished, prompting the Universe to shift from abounding with neutral hydrogen to dazzling with ionized hydrogen. This process is named ‘The Epoch of Reionization’ and is the essential element to the form of the Universe as it is today.
Even though the researchers now partly understand what might have happened and the process of change of the Universe, they still have no idea on how the Universe was sufficiently packed with radiation to shift wholly. Also, they don’t know what the cause of it was.
To answer to the question of what caused the Universe to change completely, the researchers searched for images took by Spitzer Space Telescope which filmed two areas of the sky for about 200 hours, and detecting light that started its journey at the possible beginning of the Universe (more than 13 billion years back).
Astronomers could discover 135 far-away galaxies and identified a specific brightness in two particular wavelengths where light is generated in the middle of the process of ionizing radiation crushing with oxygen and hydrogen. What this implies is that those young galaxies had once had massive new stars formed of helium and hydrogen. Even if these objects weren’t the Universe’s earliest stars, they would provide scientists with clues on how the Universe changed in the time they formed.