the Hubble Space Telescope and NASA scientists have produced the most comprehensive survey of the Andromeda galaxy, or Messier 31. The Andromeda galaxy is approximately 2.5 million light-years ...

His remark holds true now, nearly half a decade later. At 2.5 million light-years away, the Andromeda Galaxy—officially called Messier 31—is the farthest object visible to the naked eye.

Galactic neighbor: NASA's Hubble Space Telescope has captured a massive panoramic view of the neighboring Andromeda galaxy (Messier 31), which is situated just over 2.5 million light-years away ...

A possible culprit is the compact satellite galaxy Messier 32, which resembles the stripped-down core of a once-spiral galaxy that may have interacted with Andromeda in the past. Computer simulations ...

A possible culprit is the compact satellite galaxy Messier 32, which resembles the stripped-down core of a once-spiral galaxy that may have interacted with Andromeda in the past.

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

the magnificent Andromeda galaxy (Messier 31)." The galaxy can be seen with the naked eye on a very clear autumn night as a faint cigar-shaped object roughly the apparent angular diameter of our Moon.

Around 2015, astronomers took on the painstaking task of stitching together Hubble Space Telescope images of this galaxy, but that effort had focused on the galaxy's northern half. Still, however, the ...

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