Ghost Signal:Stellaris

Hi guys, just downloaded the above. £1.19 if you have psplus btw. I'm stuck on the tutorial! 😅 It's telling me to scan an object, just after i blast a couple of ships and some asteroids right at the beginning...but for the life of me I cannot find the necessary button/action for it. It's driving me daft. I've tried every button, flying the ship through it, trying to actually touch it, everything.

Please help!