Multiple choice general knowledge

October 20: European astronomers discover 32 _______, that orbits a star other than the Sun and that is thus beyond the Solar System

  1. Hexaplanets

  2. Exoplanets

  3. Ecoplanets

  4. Octaplanets

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Exoplanets are planets that orbit stars outside our Solar System. In October 2009, European astronomers using the HARPS instrument announced the discovery of 32 new exoplanets. The prefix 'exo-' means 'outside' or 'beyond' - hexaplanets, ecoplanets, and octaplanets are not real astronomical terms.