Scientists estimate that they could have an extremely precise measurement of the universe's rate of expansion within five to ten years. Image: Robin Dienel/The Carnegie Institution for Science
On the way to measuring the universe’s expansion - space science news

How big is the universe, and how fast is it expanding? Scientists believe they can answer these questions, which are at the core of today’s astronomy research, within five to ten years. They base this optimistic expectation on last year’s (2017) capture of gravitational waves radiating form a collision between neutron stars. This allows scientists to estimate mass and energy of the colliding stars, and by comparing this with the strength of the gravitational waves, they can infer how far away the stars are. This makes a precise measurement of distance possible. With optimized telescopes, astronomers think they will be able to observe more neutron star collisions to make their analysis complete in five to ten years from now.

Read the full story: University of Chicago
Scientific publication: Nature