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 ...

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

Recent research has unveiled a troubling and persistent mystery at the heart of modern cosmology: the universe is expanding ...

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous -- and highly debated -- results had shown: The Universe is expanding faster than predicted by ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

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 two keys to Edwin Hubble's breakthrough discovery were forged ... In other words, the universe must be expanding. He announced his finding in 1929. The ratio of distance to redshift was ...

In 1929, Edwin Hubble discovered from observations of distant galaxies that the Universe was expanding. This baffled astronomers and the public alike. Then in 1998, another wrinkle: Two different ...

In the early 20th century, astronomer Edwin Hubble discovered that the universe is expanding, much to the shock of the physics community at the time, including Albert Einstein, who had believed ...

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 ...

The two keys to Edwin Hubble's breakthrough discovery were forged ... In other words, the universe must be expanding. He announced his finding in 1929. The ratio of distance to redshift was ...