An Invisible Mirror World Might Be Making Our Universe Expand, Scientists Say

There could be a second universe that is pulling on ours, throwing off our calculations

Astrophysicists are puzzled by a fundamental figure that helps explain the growth of our cosmos

The Hubble constant—the expected pace of universe expansion—is becoming less accurate

This is concerning since it implies that the cosmos may be smaller than previously assumed.

The Hubble constant is a useful quantity for calculating the age of the cosmos

Cosmologists who study the evolution of our universe derive the Hubble constant in many methods

They monitor space object speeds and investigate gravitational waves from neutron stars or black holes.

NASA's Wilkinson Microwave Anisotropy Probe is used to identify old radiation.

Webb Space Telescopes

Click Here