New results from the Hubble Telescope, released in April 2019, have deepened the expanding universe's puzzle. The measurements from the space telescope show that the expansion of the universe is 9% faster than expected from previous observations. For galaxies, every 3.3 million light-years away from Earth is translated to an additional 46 miles per second (74 km per second) faster than previous estimates predicted, according to NASA.
Why does this play the role of the universe? Because physicists have to miss something. According to NASA, there may have been three separate dark energy "bursts" during the Big Bang and shortly thereafter. These outbreaks set the stage for what we see today. The first may have started the first expansion; a second may have happened much faster and acting like a heavy foot pressed on the gas pedal of the universe, causing the universe to expand faster than previously thought. A final dark energy outbreak can explain the growing expansion of the universe today.
None of this is proven ̵
1; yet. But researchers see. Researchers at the University of Texas at the Austin McDonald Observatory use a newly upgraded instrument, the Hobby-Eberly Telescope, to look for dark energy directly. The project, Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), measures weak light from galaxies as far away as 11 billion light-years, allowing researchers to see changes in the universe's acceleration over time. They will also study echoes of disturbances in the 400,000-year-old universe, created in the dense soup of particles that created everything right after the Big Bang. This will also reveal the mysteries of the expansion and explain the dark energy that drove it.