By studying how light from eight distant quasars is gravitationally lensed as it propagates towards Earth, astronomers have ...

Hubble’s measurements of today’s expansion rate do not match the rate that was expected based on how the Universe appeared shortly after the Big Bang over 13 billion years ago. Using new data from the ...

New research suggests that a troubling disparity in the rate of expansion of the universe, known as the Hubble constant, may arise from the fact Earth sits in a vast underdense region of the cosmos.

A 60-year-old prediction just helped astronomers measure the expansion of the universe. Astronomers recently used the light of a distant supernova to calculate how fast the universe is expanding. But ...

This illustration shows the three basic steps astronomers use to calculate how fast the universe expands over time, a value called the Hubble constant. All the steps involve building a strong "cosmic ...

Astronomers using NASA’s Hubble Space Telescope have discovered that the universe is expanding 5 percent to 9 percent faster than expected. “This surprising finding may be an important clue to ...