Nasa has been continuing to enthrall us with images of Pluto and Mars over the last week and it looks like there’s more to come.

Alan Stern, a planetary scientist for the agency has revealed there will be an “amazing” discovery announced this Thursday.

Stern appeared to let slip the teaser whilst speaking to an audience at the University of Alberta.

He said: “Nasa won’t let me tell you what we’re going to tell you on Thursday. It’s amazing.”