Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

For humans, the most important star in the universe is our sun. The second-most important star is nestled inside the ...

In the years following the launch of NASA’s Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous — and highly debated ...

Edwin Powell Hubble is renowned for determining that ... In 1924, he announced the discovery of a Cepheid, or variable star, in the Andromeda Nebulae. Since the work of Henrietta Leavitt had ...

But 100 years ago, astronomer Edwin P. Hubble (1889-1953), working at the Mount Wilson Observatory in California, made a stunning discovery: He calculated that a spiral nebula called Andromeda was ...

Let's take this one step by step. In 1929, American astronomer Edwin Hubble announced his discovery that galaxies scattered throughout the universe are moving away from each other — and that the ...

The Hubble constant is one of the most important numbers in cosmology because it tells us how fast the universe is expanding, which can be used to determine the age of the universe and its history. It ...

On January 29, 1931, the world's premier physicist, Albert Einstein, and its foremost astronomer, Edwin Hubble ... Twelve years later, Hubble's discovery of other galaxies racing away from ...