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Hubble, Gaia produce most precise measure of universe's expansion rate

Hubble, Gaia produce most precise measure of universe's expansion rate

Science
July 12 (UPI) -- By combining the observations of the two most powerful space telescopes in orbit, scientists have achieved the most precise measurement of the Hubble constant, the universe's expansion rate. The new measurement confirms the tension between explosion rate in the early and late universe, researchers report. Astronomers can measure the expansion of the universe by measuring a galaxy's redshift, a change in the wavelength of the light due to a change in the velocity of the object. By measuring the redshift of galaxies using the Hubble Telescope, scientists have established the Hubble constant. But investigations of the cosmic microwave background, the oldest radiation in the universe, can also be used to predict the universe's expansion rate. Maps of the microwave signature ...
New map of Universe's dark matter

New map of Universe's dark matter

Science
Researchers have released the most accurate map ever produced of the dark matter in our Universe.The team surveyed more than 26 million galaxies in the largest study of its kind.The map will help scientists understand what dark matter is made from and learn more about another mysterious phenomenon called dark energy.The results have been released by the international Dark Energy Consortium (DES).According to Professor Ofer Lahav of University College London (UCL), and chair of the DES Advisory Board, the map would provide new insights into how the Universe operates."Dark energy and dark matter represent probably one of the biggest mysteries in the world of science. And this has generated a lot of interest across the whole of science because it is a major shakeup. And actually we still don'...