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Do we live in a giant void? It could solve the puzzle of the universe's expansion

One of the biggest mysteries in cosmology is the rate at which the universe is expanding. One possible explanation: that we live in a giant void in space (an area with below average density). ....

Indranil Banik , El Gordo , University Of St , Postdoctoral Research Fellow In Astrophysics , Expert Voices , Postdoctoral Research Fellow , Big Bang , Modified Newtonian Dynamics , General Relativity ,

The universe is expanding faster than theory predicts

The universe is not just expanding – its rate of expansion is accelerating. And that expansion rate is even faster than the leading theory predicts it should be. ....

United States , Albert Einstein , Bryan Keeley , University Of California , Expert Voices , Postdoctoral Scholar ,

Astronomers have learned lots about the universe − but how do they study astronomical objects too distant to visit?

What astronomers can measure using telescopes is not what we really want to know – instead, we calculate the properties we’re interested in studying by observing and interpreting apparent properties f ....

United States , James Webb , Luke Keller , Ithaca College , Expert Voices , Creative Commons ,

Why Einstein must be wrong: In search of the theory of gravity

Unlike physical theories describing the other three fundamental forces in physics, the general theory of relativity has only been tested in weak gravity. ....

Arthur Eddington , Valerio Faraoni , Andrea Giusti , University Of Naples , Professor Of Physics Astronomy At Bishop University , Swiss Federal Institute Of Technology Zurich , Expert Voices , Swiss Federal Institute , Big Bang , Was Einstein , Cold Dark Matter ,

How do astronomers know the age of the planets and stars?

The ages of planets and stars helps scientists understand how they change – and, in for planets, if life has had time to have evolve. ....

Adam Burgasser , Omega Centauri , Expert Voices ,