Q&A WITH A PLANET HUNTER

Melissa Brobby interviews Dr Rosanne Di Stefano

You’ve found hints of what could be the first extragalactic planet to Be found, in M51, the Whirlpool Galaxy. How was this discovery made and when?

There was data that had been taken over a 20-year period by the Chandra X-ray Observatory, and the XMM-Newton Observatory, which is a European project. And these observatories both look regularly at galaxies outside the Milky