Refining intergalactic measurements could alter our whole understanding of physics

At the centre of the image is an important star called the RS Puppis, a Cepheid variable star which is a class of stars whose luminosity is used to estimate distances to nearby galaxies. This one is 15,000 times brighter than our sun.

by Ethan Bilby New efforts to figure out just how fast the universe has expanded since the Big Bang, a speed known as the Hubble constant, could upend current theories of physics, according to some scientists. Professor Grzegorz Pietrzyński at the Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences in Warsaw is one … Read more