All the light ever made in space

A team of researchers at the Clemson University in the United States has been able to measure almost any amount of light ever created in space through observations and analysis using the Fermi gamma-ray space telescope.

The universe was initiated by the Big Bang for 13.8 billion years, and it is believed that stars have begun to form from hundreds of millions of years. Until now, the galaxies in the universe have formed countless stars. The researchers were studying the early universe and observing the light that a very distant galaxy swung a long time ago. Because it was too far away, it was not possible to observe clearly, and it was a problem to add more analytical estimates. The light emitted by distant galaxies reaches the Earth through a vast universe. The space between the galaxy and the galaxy looks like darkness to us. In reality, however, all the galaxies, stars, and explosions that emerge after the birth of the universe can be thought of as diffused.

This diffused light can be understood as a cosmic fog with background illumination outside the galaxy. In other words, in distant galaxies, light is like a car headlight that lights the way in the night. It spreads in the middle.

The researchers surveyed 739 quasars with dozens to millions of observable suns, and nine years of gamma ray bursts when black holes were created. A quasar that collects energy from a massive black hole and emits space jets in the disk axis direction is stronger in redshift and can only be seen in the distant universe. The researchers calculated the backlight outside the galaxy to know the gamma ray attenuation given here.

According to this method, the amount of photon emitted into the outer space of the galaxy is 84 × 4 × 10. If you just use it as a letter, it could be a ridiculous level. It is difficult to think of the answer to the ultimate question about life, the universe and all things, but it is a tremendous amount to imagine the size of a number.

However, even if there is such a large amount of photons, the actual brightness is only about 4 km away from the facility with a 60 W light bulb because it spreads throughout the universe.

The researchers categorized the distance and measured the amount of space light in the same universe period, billion, two, and six billion years ago. This data shows that the universe was able to effectively investigate the days when the first stars were born. The researchers say the first billion years of the universe can not be observed by human technology yet, and they plan to try to look at it through this study.

Understanding the formation of stars can affect many areas of astronomy such as galaxy evolution and dark matter in space dust. The results of the study are also expected to be of benefit to observations through the James Web space telescope, which will be launched in 2021. For more information, please click here .