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Excluding the Large and Small Magellanic Clouds, visible from Earth’s Southern Hemisphere, the Andromeda galaxy is the brightest external galaxy visible in our night sky. And, at 2.5...
Learn about the Andromeda Galaxy, the nearest major galaxy to the Milky Way, and its observation history from ancient to modern times. Find out its distance, size, mass, structure, and future collision with the Milky Way.
Learn two ways to locate the Andromeda galaxy, the nearest large spiral galaxy to the Milky Way, by star-hopping from Cassiopeia or Pegasus. See charts, tips and photos of this stunning object in...
Learn about the nearest major galaxy to Earth, its size, age, structure and history. Find out how to see Andromeda in the night sky and what will happen when it merges with the Milky Way.
Andromeda Galaxy, great spiral galaxy in the constellation Andromeda, the nearest large galaxy. It is one of the few visible to the unaided eye, appearing as a milky blur. The Andromeda Galaxy is located about 2,480,000 light-years from Earth, and its diameter is approximately 200,000 light-years.
Learn about the history, structure and features of Messier 31, the nearest major galactic neighbor to our Milky Way. See stunning images of the spiral galaxy taken by the Hubble Space Telescope, revealing its stars, clusters, dust and black hole.
Learn how to spot the spiral arms of Andromeda, the closest major galaxy to Earth, with just a pair of binoculars. This article explains where to look, when to observe and what to expect from...
Learn how NASA's Chandra X-ray Observatory found 26 possible black holes in Andromeda, the nearest spiral galaxy to Earth. See optical and X-ray images of Andromeda's center and its globular clusters.
See the sharpest large composite image of our galactic next-door neighbor, Andromeda, taken by the Hubble Space Telescope. The image reveals over 100 million stars, star clusters, dust structures, and the galaxy's evolution over billions of years.
Hubble captures the sharpest and biggest image ever of the Andromeda galaxy, showing over 100 million stars and thousands of star clusters. The image is the product of the Panchromatic Hubble Andromeda Treasury programme and covers over 40 000 light-years of the galaxy.