All scenarios / Space

Rogue Planet Collision

Melancholia, but with less Kirsten Dunst.

What it is

In Melancholia, a rogue planet wanders into the solar system and collides with Earth. Rogue planets are real. They're planets that were ejected from their home systems and now drift through the galaxy without a star.

Why it ranks where it does

Astronomers estimate that rogue planets could be common across the Milky Way, but space is enormous. Anything large enough to threaten Earth would be detected years or decades in advance by infrared surveys, and nothing of the sort has been seen near the solar system. That's why the score is zero.

Evidence on the board

• Nothing of the sort is detected anywhere near the solar system.

What the experts say

A close pass by another star or rogue planet over billions of years could disturb the distant Oort Cloud and send comets inward. That's a slow process measured in millions of years.

The movie vs. reality

Lars von Trier's Melancholia (2011) uses a planet's slow approach as a portrait of depression, and its science is deliberately dreamlike. A real rogue planet the size of Jupiter would glow faintly in infrared from its own internal heat, and missions like NASA's WISE survey have mapped many cold, dim objects near the Sun without finding anything on a collision course. The nearest known star system, Alpha Centauri, is about 4.2 light-years away. Interstellar objects such as 'Oumuamua, discovered in 2017, do pass through, but they're tiny.

What would move the number

Live signals we track

The baseline above is set from the evidence as of October 13, 2026. On the live board, your browser adjusts it in real time using these feeds. Chatter can only nudge a score in proportion to its evidence, so attention alone can't make an unlikely scenario look likely.

• Public attention: daily Wikipedia pageviews for Rogue planet
• Online chatter: Hacker News stories mentioning "rogue planet" this week vs. the prior eight weeks

Sources

1. Wikipedia: Rogue planet
   https://en.wikipedia.org/wiki/Rogue_planet

Baseline scores are an editorial threat index from 0 to 100 that combines current reporting with published expert estimates. They're meant for comparing risks, not as actuarial forecasts. See how the numbers work.