A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Whether the Universe will 'end' at all is not certain, but all evidence suggests it will continue being humanity's cosmic ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

The universe is expanding. That much is clearer. But it’s less clear whether this expansion is accelerating or slowing down.

Scientists have many big questions to tackle about the universe, including how big it actually is. But even the proposed ...

For several decades, evidence has suggested that the expansion of the universe is accelerating. Crucial to those estimates were the use of standard candles, celestial events of the same luminosity ...