“The heart can get really cold if all you've known is winter.” -Benjamin Alire Sáenz
If you didn't read everything this week on Starts With A Bang, it's hard to blame you. Each week, on practically a daily basis, we've got new pieces coming at you, sharing the wonders of the Universe in our own unique fashion. The past seven days alone saw the following:
Optical Method Measures Universe Expansion | Research & Technology | Apr 2021 photonics.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from photonics.com Daily Mail and Mail on Sunday newspapers.
University of Michigan
Quasars are extraordinarily distant celestial objects that throw off a massive amount of light, and astrophysicists use them to probe cosmological theories.
In some cases, astrophysicists have used them to estimate the rate at which the universe expands, called the Hubble constant.
Now, a team of researchers from the University of Michigan and the University of Hawaii’s Institute of Astronomy are suggesting a new way to use them to measure the expansion of the universe directly. They propose a method called intensity correlation speckles to measure the difference between the redshift-in which light stretches as it travels through an expanding universe, causing its wavelength to elongate-in two paths of light from the same quasar. The team’s method was published in the journal Physical Review A.