Andromeda Nebula Trivia Questions

Under dark skies, Andromeda appears as a faint smudge; it's the farthest object visible without a telescope, at 2.5 million light-years.

It was once thought a nebula, but Edwin Hubble proved in 1923 that Andromeda is a separate galaxy far beyond the Milky Way.

Simulations confirm Andromeda and the Milky Way are on a collision course, merging into a giant elliptical galaxy in roughly 4.5 billion years.

Andromeda is a spiral galaxy with an estimated 1 trillion stars, far outnumbering the Milky Way's 100-400 billion stars.

Andromeda is blueshifted, meaning it's moving toward us at about 300 km/s, not away; local gravity overcomes cosmic expansion.

Andromeda is actually six times wider than the Moon, but its faintness makes it appear smaller; only long-exposure photos reveal its true size.

While no exoplanets have been confirmed in Andromeda due to distance, it's statistically certain its trillion stars host countless planets.

Andromeda's core hosts a black hole with a mass of about 140 million suns, far larger than our own galaxy's 4 million solar-mass black hole.