Gravitational lenses measure universe expansion
It's one of the big cosmology debates: The universe is expanding, but how fast exactly? Two available measurements yield different results. Leiden physicist David Harvey adapted an independent third measurement method using the light warping properties of galaxies predicted by Einstein. He published his findings in the Monthly Notices of the Royal Astronomical Society.
from Phys.org - latest science and technology news stories https://ift.tt/38QPCWk
from Phys.org - latest science and technology news stories https://ift.tt/38QPCWk
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