Determining the expansion rate of the universe, the "Hubble constant," shapes our understanding of the cosmos, its age, and its fate.
Distant, ancient galaxies are giving scientists more hints that a mysterious force called dark energy may not be what they ...
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What is the universe expanding into?Euan Tobin Edinburgh, Scotland This excellent question forces us to confront a region beyond the bounds of our intuition ...
How big is the universe? Could it be infinitely large? If the universe has an edge, what is beyond the edge? And if the universe had a beginning, what was going on before that? Our experience of ...
Beyond Einstein? Not by a long shot. Einstein might be startled by the universe as we understand it today. But it is unmistakably his.
NASA’s New Horizons spacecraft beyond Pluto has made ... remained unaccounted for. So what’s the source? Options include: Dwarf galaxies in the nearby Universe that haven’t yet been detected.
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