But, far beyond this cluster, and seen when the Universe was only about 600 million years old, is a very faint galaxy called A2744_YD4.
The galaxy is called A2744_YD4, and it's the most distant galaxy ever found by ALMA.
The universe burst into existence almost 13.8 billion years ago in an event we now know as the Big Bang.
This galaxy is 13 billion light-years away from Earth, appearing to the astronomers as it was when the Universe was only 600 million years old, only 4 percent of its present age of 13.82 billion years.
The ancient galaxy was found by astronomers via the gravitational lensing technique.
Understandably, getting a clearer picture of the formative years of the universe - the era when the first stars and galaxies "switched on" - is of vital interest to scientists.
Nearly all of the elements around us today - from the oxygen in the atmosphere to the nitrogen in human DNA to the uranium in power plants - were forged within stars and then scattered by supernovae before clumping into other stars, planets, and, ultimately, human beings.
This is the most distant, and hence earliest, detection of oxygen in the Universe, surpassing another ALMA result from 2016.
The scientists determined that the dust scattered in A2744_YD4 added up to about six million times the mass of the Sun, while the mass of all its stars amounted to two billion times the mass of the Sun. A2744_YD4 produces stars at a rate of 20 solar masses per year, which is a full 20 times the rate of our Milky Way's comparatively paltry star formation rate of 1 solar mass per year. In the press release accompanying the announcement, Laporte explained that "the detection of so much dust indicates early supernovae must have already polluted this galaxy".
This artist's impression shows what the very distant young galaxy A2744_YD4 might look like. She studied journalism at Douglass College, Rutgers University, and earned a Graduate Certificate of Science in astronomy from Swinburne University's Astronomy Online program. This dust is an integral component of today's stars (like our Sun) and the planets surrounding them. But before the first generations of stars died out, such cosmic dust has been scarce.
That means stars began to form 200 million years before the light from A2744_YD4 reached ALMA's telescope array, making the stardust that astronomers can see the remnants of some of the earliest stars in the universe, the researchers said.
The young galaxy's stardust is a valuable clue for the researchers and serves as a treasure trove of information in studying the time frame and period of the first supernovae and the time when stars lit up the whole universe. Says Laporte, "Further measurements of this kind offer the exciting prospect of tracing early star formation even further back into the early universe".