(disclaimer: AIM judge review here! these are just my opinions and thoughts, you can take from them whatever you like! music is subjective and all that. <3)
a very serene, contemplative piece...! i feel a sense of divinity coming from the way you wrote this - choral pads, evolving sounds that swell and fade, and a very slow rhythm filled with open space. it's very thoughtful and fpairs wonderfully with the heavenly bodies depicted in the artwork you chose; a fitting sense of humbleness and reverence of the human in the presence of the almost inconceivably large and powerful.
i really like when the piano part quietly comes in over the top of the chords; it's just enough motion to develop the piece without feeling like too much. harmonically, i think this could develop its progressions a *little* more instead of repeating - introducing just a bit more contrast and some tensions (or dissonances) that lead into nice cathartic releases. but what you have already is quite lovely, that's just my thought for really taking it to the next level.