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 ...

NASA's forthcoming Nancy Grace Roman Telescope will hunt for "cosmic orphans," starless planets that might even outnumber their orbiting counterparts in our galaxy. When you purchase through links on ...

The Milky Way galaxy, comprised of billions of stars, will be visible in the night sky until the end of May, particularly between the last quarter moon (May 20) and the new moon (May 30). Light ...

The warp in the Milky Way's spiral disk is precessing backward under the influence of the enormous mass of dark matter that forms an invisible halo around our galaxy, Chinese astronomers have ...

LOS ANGELES - The Milky Way is home to at least 17 billion planets that are similar in size to Earth, a new estimate suggests. That's more than two Earth-size planets for every person on the globe.

This size places it in the larger end of known comets ... Its velocity suggests a long and potentially ancient journey ...

Late in the evening of October 5, 1923, Edwin Hubble sat at the eyepiece of the Hooker telescope at the Mount Wilson Observatory, atop the mountains overlooking the Los Angeles basin. He was observing ...