One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate.’
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...
PBS1y
Hubble finds proof that the universe is expanding
The two keys to Edwin Hubble's breakthrough discovery were ... Slipher knew that a shift toward red suggested the body was moving rapidly away from the observer. But he had no way to measure ...
BBC4y
Cosmological red shift of the light from galaxies
This is called the red shift. Light wavelengths from an object emitting light are compressed by movement towards the observer. This is called the blue shift. Edwin Hubble was an American ...
PBS8y
Hubble finds proof that the universe is expanding
The two keys to Edwin Hubble's breakthrough discovery were ... Slipher knew that a shift toward red suggested the body was moving rapidly away from the observer. But he had no way to measure ...
Hosted on MSN1mon
One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’
A hundred years ago, astronomer Edwin Hubble dramatically expanded ... which captures the intensity of light from blue to red. Astronomers call a shift to longer wavelengths a redshift.
Hosted on MSN1mon
One large Milky Way galaxy or many galaxies? 100 years ago, Edwin Hubble settled astronomy's 'Great Debate'
A hundred years ago, astronomer Edwin Hubble dramatically expanded ... which captures the intensity of light from blue to red. Astronomers call a shift to longer wavelengths a redshift.
Times Union1mon
One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’
Chris Impey, University of Arizona (THE CONVERSATION) A hundred years ago, astronomer Edwin Hubble dramatically ... of light from blue to red. Astronomers call a shift to longer wavelengths ...