Hubble Constant

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The Hubble Constant, explained

The Hubble constant, explained

Black hole collisions could help us measure how fast the universe is expanding Artist's rendition of colliding black holes

Black hole collisions could help us measure how fast the universe is expanding

‘There may not be a conflict after all’ in expanding universe debate Illustration of a bright light at the center of a reddish star

‘There may not be a conflict after all’ in expanding universe debate

Aging stars provide a new cosmological yardstick Telescope image focused on a red star

Aging stars provide a new cosmological yardstick

New measure of Hubble constant adds to mystery about universe’s expansion rate Red giants

New measure of Hubble constant adds to mystery about universe’s expansion rate

Video: Prof. Wendy Freedman explains the Hubble Constant measurement mystery Wendy Freedman

Video: Prof. Wendy Freedman explains the Hubble Constant measurement mystery

Prof. Wendy Freedman explains the Hubble Constant measurement mystery

How to use gravitational waves to measure the expansion of the universe Neutron star collision

How to use gravitational waves to measure the expansion of the universe

Gravitational waves could soon provide measure of universe’s expansion Gravitational Waves

Gravitational waves could soon provide measure of universe’s expansion

LIGO announces detection of gravitational waves from colliding neutron stars Illustration of gravitational waves

LIGO announces detection of gravitational waves from colliding neutron stars