For a more everyday home projector, there’s the new Epson EF-21 and EF-22 models that start at a comparably more affordable ...

The City of Johannesburg, in partnership with the World Wide Fund (WWF) and the South African National Biodiversity Institute ...

Place a construction-paper star field on the projector so that the holes in the paper create points of light on the sheet. Explain to students that we on Earth see the stars in the sky as if they ...