Bring the solar system into your living room with these floating lights from Japan’s TakaraTomy.
These Fuwarito lamps look like the earth and the moon, but are just simple helium-filled mylar balloons with an LED built into the bottom. Each light comes with a two cans of helium gas and weighted base to keep them from floating away. Turn the lights off, and you’ll feel like you’re floating around the galaxy with these hovering planetary bodies. They can be found at Japanese retailer ASCII for ¥3,343 each (about $27 USD.)
All you need to do is add one of those laser star projectors to complete the effect.