Posts by 

Kelen Tuttle

When space expanded faster-than-light

New maps from Planck mission support theory of cosmic inflation, the idea that, in the moments following Big Bang, space expanded faster than the speed of light. George Efstathiou - a Planck mission leader - explains more to Kavli Institute's Kelen Tuttle.

2021 EarthSky Fundraiser

Any amount will help us reach our goal.

Would you consider


If you've already donated, we apologize for the popup and greatly appreciate your support.