NASA has said it Hubble Space Telescope has found rare, age-defying stars, the 'blue stragglers', in our galaxy.
It's the first time they have been found in our Milky Way galaxy though these oddball stars have been found in more distant star clusters, the space agency said in a release.
This finding has some impact on the study of stars. NASA said the spotting of blue stragglers supports the idea that the Milky Way's central bulge stopped making stars billions of years ago.
The observations clearly indicate that if there is a young star population in the bulge, it is very small, the agency said in a statement. It was not detected in the SWEEPS program. Blue stragglers long have been suspected to be living in the bulge, but had not been observed because younger stars in the disk of our galaxy lie along the line-of-sight to the core, confusing and contaminating the view.
NASA said it is not clear how blue stragglers form. A common theory is that they emerge from binary pairs. As the more massive star evolves and expands, the smaller star gains material from its companion. This stirs up hydrogen fuel and causes the growing star to undergo nuclear fusion at a faster rate. It burns hotter and bluer, like a massive young star.