In the image above, you can see Earth is the bright dot in the middle of the image, and the Moon is the smaller dot to the right. But if you look closely, there's much more to be seen in the background. Several constellations are also visible in the surrounding space. The bright cluster of stars in the upper left corner is the Pleiades in the Taurus constellation. Hamal, the brightest star in Aries, is located in the upper right corner of the image. The Earth-Moon system is centred in the middle of five stars comprising the head of Cetus the Whale.
Image Credit: https://www.asteroidmission.org/
The probe is estimated to reach its destination, the asteroid Bennu, in August 2018 – and will bring both materials and photos of this asteroid 'time capsule' back to Earth around September 2023.
The acronym OSIRIS was chosen in reference to the ancient mythological Egyptian god Osiris, the underworld lord of the dead. He was classically depicted as a green-skinned man with a pharaoh's beard, partially mummy-wrapped at the legs and wearing a distinctive crown with two large ostrich feathers at either side. Rex means 'king' in Latin. His name was chosen for this mission as asteroid Bennu is a threatening Earth impactor, with an estimated 1-in-1,800 chance of hitting Earth in the year 2170.