Astronomy & Astrophysics 101: Measuring the Age and Size of the Universe - SciTechDaily

The search for Cepheids The top-ranked scientific justification for building the Hubble Space Telescope was to determine the size and age of the Universe through observations of Cepheid variables in distant galaxies. This scientific goal was so important that…

ByESA/HubbleMay 29, 2022 Spiral galaxy NGC 4603 containing Cepheids being used for distance measurements. Credit: ESA/Hubble & NASA, J. Maund The search for Cepheids The top-ranked scientific … [+4522 chars]

full article...