Editor’s note: A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here . CNN  —  Like nostalgia-evoking songs, objects can help us feel like we’ve preserved a moment in time. After our wedding last Sunday, my husband and I were already anticipating how we might relive our special day years down the road. Photos and videos captured so many moments, like our vows that mirrored an appreciation for the stars (points to the groom for