Milani CubeSat in its Tyvak International cleanroom. Carried aboard ESA's Hera mission for planetary defence with the Juventas CubeSat, Milani will survey Dimorphos as well as the larger Didymos object that the asteroid orbits around in a wider range of colours than the human eye can see, to identify the mineral makeup of the asteroids and even individual boulders resting on them. It will also survey the dust environment surrounding these bodies. And the inter-satellite link system between the Hera mothership and its smaller companions will track small tugs in their relative positions due to the gravitational pulls of the asteroids, helping to assess their mass.