A Galaxy Appears in the Sky at Least 12 Times Due to Strong Gravity

Galaxies of 11 billion light-years away can be seen arcing across a recent Hubble image, displaying a smear of light. There are 12 copies of the galaxy named PSZ1 G311.65-18.48, also called Sunburst Arc, which rushes across the sky. Such a phenomenon is a real joy and opportunity for astronomers because they get the chance to study it more.

But how does gravity influence the galaxy in the first place? Well, as we know, gravity is a real catcher, being pretty much attractive. Gravity also is known as the unseen, hidden, and so mysterious force that compels the Universe, proportional to mass. To understand better this fact, you must know that when an object has a lot of mass, than the stronger the gravity will become. Also, keep in mind that it’s not only physical matter it attracts. There is also the fact that a strong gravity can redirect the track of light.

Intriguing enough to mention furthermore that on galactic scales, a bunch of galaxies, for example, can mold and expand the light of something behind it, far away. Such an action is known as gravitational lensing and is an effect predicted by Einstein.

Moreover, this effect can double the images, realizing many copies of a weak, distant galaxy. Sunburst Arc is the perfect example to show this fact. Because of the power of the lensing, Sunburst Arc represents one of the brightest lensed galaxies, so far, even if it happens to be far away. The Hubble captures also display that the Sunburst Arc is analogous to the very first galaxies in the Universe. Such a fact happened around the Epoch of Reionisation, 13.3 to `2.8 billion years ago. Astronomers explain that maybe the radiation from the first stars and galaxies resulted in this magic, but they also indicate a problem. The high-energy radiation needed to ionize the hydrogen required to have been capable of exiting galaxies without being consumed by the interstellar place. However, there have been only a few galaxies that did this.

Sunburst Arc offers a clue, showing that some photons can ‘escape’ through straight channels in neutral areas that possess a lot of gas. Such a fact might indicate that Sunburst Arc is unlikely to have been the only one responsible, but it could have a significant contribution.