According to new findings published recently by an international team of astrophysicists, the universe is around 13.8 billion years old.
While this
estimate of the universe's age was previously known, additional scientific
observations in recent years have revealed that the universe could be hundreds
of millions of years younger.
The
scientists examined a snapshot of the universe's oldest light to validate its
13.8 billion-year age.
The cosmic
microwave background, or "afterglow" of the Big Bang, commemorates a
time 380,000 years after the universe's formation when protons and electrons
combined to form the first atoms.
According to a statement from Stony Brook University, obtaining the greatest snapshot of the baby universe helps scientists better comprehend the universe's origins, how we got to where we are on Earth, where we are headed, how the universe may end, and when that ending may occur.
"We're
restoring the universe's 'baby photo' to its original condition, removing the
wear and tear of time and space that has warped the image," said Neelima
Sehgal, a co-author on the articles from Stony Brook University.
"We can only truly grasp how our universe was created if we see this crisper infant photo or image of the universe," Sehgal added.
The new
findings match the measurements of the Planck satellite data of the same
ancient light by using observations from the Atacama Cosmology Telescope (ACT)
in Chile.
By
measuring the universe's oldest light, the ACT team can estimate its age. Other
scientific groups use galaxies to estimate the age of the universe.
According
to Simone Aiola, first author of one of the new articles on the discoveries,
"the research adds a fresh twist to an existing discussion in the
astrophysics community concerning the age of the universe."
"Now we've come up with a solution where Planck and ACT agree," said Aiola, a researcher at New York City's Flatiron Institute's Center for Computational Astrophysics. "It demonstrates the accuracy of these tough measures."
The ACT
research team is made up of scientists from 41 different universities across
seven different nations.
References:
The papers
are available on the open-access arXiv.org and have been submitted to the
Journal of Cosmology and Astroparticle Physics:
- The Atacama Cosmology Telescope: DR4 maps and cosmological results.
- The Atacama Cosmology Telescope: A measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz.
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