‘Hubble problems’ could get worse with new measure of universe expansion

An image of the Cepheid variable star RS Puppis. (Image credit: NASA, ESA and Hubble Heritage Team (STScI/AURA)-Hubble/Europe Collaboration)

The most accurate observation yet of distant stars whose brightness changes periodically could trigger a rethinking of the rate at which the universe is expanding – perhaps solving a long-standing problem in cosmology, or deepening.

The observation confirms a disparity that exists between the two main methods of measuring speed the universe grows, conforms to one but not the other, reports a new study.

Researchers from the Stellar Standard Candles and Distances group used data collected by Europe Gaia spaceship to study Cepheid variable stars, which pulsate regularly, making it possible to accurately measure cosmic distances. The Cepheid star measurement technique extends to other methods, such as one that relies on Type 1a observations supernova.

#Hubble #problems #worse #measure #universe #expansion

Leave a Reply

Your email address will not be published. Required fields are marked *