One of the most powerful instruments the world knows when it comes to measuring interstellar space is the Hubble Space Telescope. With over a billion images of strange and interesting phenomena happening around the universe in its range, Hubble is currently working on a much larger mission – determining how fast our universe is expanding.
New discoveries show that the universe is not expanding at the same rate. The US space agency NASA has suggested that “something strange” is happening in the universe, due to a mismatch in the speed of expansion of the universe around us and the observations made after the Big Bang.
The study of how the universe expanded and how quickly it began decades ago in 1920, when the measurements of Edwin P. Hubble and Georges Lemaître suggest that galaxies beyond our own are not stationary and are actually moving away from us. Hubble added that these galaxies are moving at an uneven, increasing pace. The farther a galaxy is from Earth, the faster it recedes.
Since then, scientists have been trying to understand the phenomenon and measure the speed of this expansion. However, with the available data from Hubble, it seems that the said extension is even faster than what the models predicted. Instead of the expected 67.5 (plus or minus 0.5) kilometers per second per megaparsec, observations show 73 (plus or minus 1) kilometers per second per megaparsec.
Scientists are currently studying the strange phenomenon on the set of space and time “markets for mercy”. They can be used to track the rate at which the universe is expanding as distant galaxies continue to move away from us. NASA said Hubble had calibrated more than 40 such markers for miles since the telescope was launched in 1990.
With the new data, which marks the beginning of a new assessment of our understanding of the expansion of the universe, scientists are now awaiting data from the new James Webb Space Telescope that will allow a deeper look at the issue. “The Web Space Telescope will expand Hubble’s work by displaying these space markers for miles longer or with sharper resolutions than Hubble can see,” NASA said.
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