Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their results match “local” measurements but clash with early-universe estimates, ...

For much of the twentieth century, scientists expected the expanding universe to slow over time. The opposite turned out to be true. Space is stretching faster today than in the past, and the precise ...

Lensing in action: A montage of eight time-delay gravitational lens systems. There is an entire galaxy at the centre of each image, and the bright points in rings around them are gravitationally ...

Gravitational lensing, caused by massive objects bending light, is helping astronomers study distant galaxies, map dark matter, and probe cosmic evolution. Recent advances with telescopes like Euclid ...

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Add Yahoo as a preferred source to see more of our stories on Google. A new look at distant quasars split by gravity shows the universe may be growing faster than expected. (CREDIT: SpringerNature ...