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NASA's Roman to Use Rare Events to Calculate Expansion Rate of Universe

Release date: Wednesday, February 7, 2024 10:00:00 AM Eastern Standard Time

NASA's Roman to Use Rare Events to Calculate Expansion Rate of Universe



Lensed supernovae offer precise, independent measurement

With a panoramic view 200 times larger than the Hubble Space Telescope’s infrared view, the sheer amount of data captured by the upcoming Nancy Grace Roman Space Telescope will change the landscape of astronomy.

Astronomers interested in studying a variety of topics, including the mystery of dark energy and the acceleration rate of the universe, are readying themselves to best harness this torrent of data the moment it arrives on Earth soon after Roman’s launch.

One team in particular is focused on training Roman to find gravitationally lensed supernovae, objects that can be used in a unique method to measure the expansion rate of the universe. They say Roman’s study of these elusive lensed supernovae can have enormous potential for the future of cosmology.



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