Researchers have long recognized that the universe is extending, but the ’90s info from the Hubble telescope displayed something odd: the extension is taking place quicker now as compared to what it did when the universe was in an early phase. This flew in the face of all our universe models, and physicists understood that there must be some type of power all over the space which paces the expansion of the universe. They dubbed this occurrence as dark energy, and years later we still have little knowledge of what it might be.
One possible clarification for the phenomenon is that dark energy is the 5th force reacting on the matter, together with the electromagnetic, gravitational, and weak & strong nuclear forces. Lately, a group at Imperial College London made a decision to try this 5th force theory by conducting an experiment on solo atoms.
The experiment operated by testing whether a 5th force becomes feeble when there is extra matter present—conflicting to the gravitational force, which is powerful when there is extra matter close by. If this was the scenario, you might anticipate finding the 5th force present strongly in the space vacuum, but weak on Earth (when around matter).
On a related note, researchers are one step nearer to better understand dark energy and accurate 3D map the galaxy. For quite a time, a group of over 70 global agencies have been developing the DESI (Dark Energy Spectroscopic Instrument), which will let us see the sky in a manner we never have earlier. Previously, DESI surpassed a “first light” landmark when researchers created the first focused pictures with the precision lenses of the instrument. The pictures display the Whirlpool Galaxy—an expected 23 million light-years from our planet. Testing of the lens is a fraction of an effort to get DESI live sometime this year.