Edwin Hubble

‘Singing’ red giant stars could be another way to measure the expansion of the universe

by

In about 5 billion years, the fuel needed for nuclear fusion in the sun’s core will run out. This will cause the inner core to collapse under the force of the sun’s gravity. At this point, the star’s outer layers (where nuclear fusion is still taking place) will expand and it will enter a phase … Read more

Can a ‘supervoid’ resolve a brutal debate over the expansion rate of the universe?

by

A large discrepancy between different measurements of the expansion rate of our universe could be explained if our galaxy, the Milky Way, is located in a void of two billion light years. That is the conclusion of scientists who claim that a modified theory exists gravity can replace the standard model of cosmology. However, this … Read more