The Hubble constant tells us the rate at which this is happening. The expansion of the universe is driven by all the mass, radiation and energy contained within it. The Friedmann equation, derived ...

Hubble's images have helped to pin down the age of the universe, which the expansion rate of pulsating stars suggests is some 13 billion to 14 billion years. Hubble has also captured images of ...

This was a relief to Edwin Hubble's contemporary, Albert Einstein, who deduced the universe could not remain stationary without imploding under gravity's pull. The rate of cosmic expansion is now ...

This led to the calculation of the point where the expansion began, and confirmation of the big bang theory. Hubble calculated it to be about 2 billion years ago, but more recent estimates have ...

But Hubble's early days nearly doomed it to failure ... advanced our understanding of dark energy and cosmic expansion, and uncovered black holes lurking at the heart of galaxies.

For years, scientists have used a well-established model to explain how the universe evolves. The standard theory, called the ...

That wasn’t just wifely pride. Years before Hubble detected cosmic expansion, Einstein had fashioned a theory, general relativity, that could explain it. In studies of the cosmos, it all goes ...

Dark energy, the mysterious phenomenon that powers the expansion of the universe, may undergo periodic 'violent transitions' ...

Drawing upon data from Vesto Slipher and Henrietta Leavitt, Hubble demonstrated a correlation between galactic distance and redshift. ... We now know this is due to cosmic expansion. Space itself ...

The expansion of the Universe is not constant. Recent measurements have shown that the rate of the Universe's expansion is increasing. The evidence for this area of physics comes from observations ...

The further away they were, the faster they receded. This led to the calculation of the point where the expansion began, and confirmation of the big bang theory. Hubble calculated it to be about 2 ...