A decade of observations by NASA’s Hubble Space Telescope has produced the sharpest and most detailed images of the Andromeda ...

Danish astronomer Ejnar Hertzsprung realized the tremendous significance ... and calibrated Leavitt's graph with absolute magnitudes. When Edwin Hubble discovered a Cepheid within the so-called ...

The Andromeda galaxy is the galaxy next door, a very faint, fuzzy thing in the night sky, larger than a full moon. Textbooks ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

But in the early 1920’s, building on the work of Henrietta Swan Leavitt and others, astronomer Edwin Hubble produced the first clear evidence that the swirling clusters visible through ...

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of ...

An astronomer named Edwin Hubble settled the debate. Peering through a telescope at the Mount Wilson Observatory near Pasadena, he was able to resolve individual stars in the nebulae.

Astronomer Edwin Hubble confirmed a century ago that countless galaxies exist beyond our Milky Way and the universe is constantly expanding. James Webb led NASA from 1961 to 1968, presiding ...

Early in the book, Panek cites a 1936 quote from American astronomer Edwin Hubble: "The history of astronomy is a history of receding horizons." ...