The Debrief

“A Potential Paradigm Shift in Cosmology”: Scientists Uncover Evidence the Universe’s Expansion is Slowing Down, Not Accelerating

Korean scientists studying Type Ia supernovae have found strong evidence that the universe's expansion is not accelerating, ...

Universe's expansion 'is now slowing, not speeding up': Evidence mounts that dark energy weakens over time

The universe's expansion may actually have started to slow rather than accelerating at an ever-increasing rate as previously ...

Pixelized galaxy cluster strong lens modeling improves precision of Hubble constant measurement

For the first time, an international research team led by the Shanghai Astronomical Observatory (SHAO) of the Chinese Academy ...
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Hubble Constant Tension Explained - 'Measuring The Expansion Rate Of The Universe'

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

The universe isn’t behaving like we thought it was, scientists say

The expansion of the universe is already confusing and controversial, with researchers unclear exactly how fast it is going and why it is doing so. The dispute over the expansion has only become more ...

Hubble Zooms In on a Galaxy That Maps the Universe’s Expansion

Hubble’s updated view of NGC 3370, richer in light and detail than ever before, deepens our understanding of both the galaxy and the cosmos itself. This new Hubble Picture of the Week highlights a ...