The boundary of everything humans can observe stretches roughly 92 billion light-years across, a figure shaped by 13.8 ...

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight Center. Credit: NASA's Goddard Space Flight Center Producer & Director: James ...

Hubble’s observation revealed that the rate at which our universe is expanding is accelerating. As more time passes, the ...

Using a new framework, astronomers arrived at the most precise measurement of our universe’s expansion rate—but things still don’t add up, they say. Reading time 3 minutes One major, unsolved problem ...

For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right now? The expansion rate, called the Hubble constant, ought to come out the ...

Explore 15 photos and facts about the Hubble Telescope, revealing its discoveries, missions, and breathtaking views of space.

Our best model of the cosmos has a glaring mathematical problem, but we may have found an answer.

Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Artist’s interpretation of the cosmic distance ladder — a succession of overlapping methods used to measure distances across the Universe, where each rung of the ladder provides information that can ...

An image that could solve a long lasting cosmic mystery Unprecedented chance to measure the growth of the universe Collaboration between TUM, LMU and Max Planck Institutes That the universe is ...