MapleSilver
Frost Egg Collector
I really miss the Observatory as well, though I mostly played City Folk myself. Constellations were a great way to further customize your town, so I don't know why they removed them. Maybe so Celeste can run the Gift Shop? I don't know why they couldn't just create a new NPC to do that. If people were making inappropriate constellations, they can do that with designs as well. If you didn't want them in your town, simply don't make them.