Who it's for

For a classroom, a lecture hall and a curious evening

Nothing to install: open it on a projector, a laptop or a phone, and every figure carries its source.

Teachers and lecturersPut scale on the screen: from light-years to a planet's orbit in one lesson. The tours step through the galaxy and the solar system stop by stop, and any ranking you build is a link you can hand to a class.
StudentsWhere the planets are tonight, how far the nearest stars really are, what a nebula is made of — with the source beside every figure, ready for a project.
Space loversCross the galaxy, fall into a black hole, catch the next eclipse on its real date. No telescope needed.
Researchers and journalistsEvery number names its source and year, so it can be checked and cited, and the exact ranking behind a story can be shared. Have better data or spot a gap? Bring it to us.