Last updated September 13, 2017 at 1:54 pm
Scientists from The Australian National University (ANU) and overseas have helped to solve the mystery of what causes exploding stars, which are used to measure the accelerating expansion of the Universe.
The international study has found that a small star hurtling through our Galaxy is highly likely to be a piece of shrapnel from a huge explosion that happened millions of years ago.
ANU Professor Lilia Ferrario said the explosion was a supernova event in a binary system where a super-dense white dwarf, a dead star that has run out of nuclear fuel, sucked mass away from its giant star companion.
The researchers used several telescopes to observe the runaway star, and mathematical modelling to determine the characteristics of the star including its mass, temperature and chemical composition.
Read more about this research on the Science at ANU website.