Lindsay House: Leading 20,000 Citizen Scientists to Uncover Dark Energy’s Secrets

Astronomer Lindsay House returned to the podcast to update us on her citizen science project called Dark Energy Explorers. Around the globe, 20,000 explorers are using data from the world’s third largest telescope to observe patterns in the movement of galaxies from between 9-11 billion years ago, to understand how the expansionary force of dark energy operates. As Lindsay explains, dark energy, which comprises 70% of the universe’s mass, is undetectable to our instruments but exerts an expansionary force by adding space between physical objects. Since 1998, we’ve known that the universe is expanding more rapidly over time, at rate that was thought to be a constant rate of acceleration. However, new evidence is pointing to an unexpected reduction in the speed of expansion. What function is dark energy exercising in time, if dark energy's force ca ...