Astronomers think the galaxy NGC1313 may be home to an intermediate-mass black hole. Credit: Gemini Observatory/AURA)

(Inside Science) — If you have a computer and a few spare moments, you can help search the cosmos for an elusive breed of black hole that astronomers once thought didn’t exist.

Black holes come in two main types: stellar-mass black holes, which generally have about 10-24 times the mass of our sun, and the much heavier variant known as supermassive black holes, which can b