Andromeda Galaxy Trivia Questions

True—Under dark skies, Andromeda appears as a smudge of light; it’s the farthest object visible without aid, about 2.5 million light-years away.

True—Charles Messier cataloged it as M31 in 1764; it’s one of the brightest Messier objects and a popular target for amateur astronomers.

False—Andromeda is actually moving toward us because its gravitational attraction overcomes cosmic expansion; most distant galaxies recede, but local ones can converge.

False—Andromeda is about 2.5 million light-years away; the closest major galaxy is the Canis Major Dwarf, roughly 25,000 light-years distant.

This is true; Andromeda is approaching us at roughly 250,000 mph, and simulations show a merger in about 4.5 billion years, though stars rarely collide.

True—Andromeda has an estimated one trillion stars, compared to the Milky Way's 100–400 billion, making it the local group's heavyweight.

True—Andromeda spans about six full Moons across, but its faint outer regions are invisible to the naked eye; only its bright core is visible.

False—The collision is more of a messy merger; stars are so sparse that few will physically crash, and most will settle into a new, larger elliptical galaxy.