May skies are brimming with action: shooting stars from Halley’s Comet, brilliant planets at dawn and dusk, and a once-in-a-lifetime nova that could light up the night sky any day now. Eta Aquarids & ...

Reference Explore the eight (or nine) planets of the solar system in order from nearest to the sun and discover the many wonders of our solar system along the way. An object seen to have moved in the ...

A moon that resembles an iconic, fictional space station known to destroy planets may be a home for life beyond Earth.