Those galaxy shots stick because they tap into a different kind of curiosity – the awe of something truly vast and rare, not just a punchy joke. People share them to feel a piece of the universe, to impress friends with something “extraordinary,” so the novelty lasts longer than a meme’s quick laugh. And unlike memes that get overplayed, these images remain fresh because they’re a snapshot of something you can’t see in real life, so the share‑cycle keeps going.