Four prominent celestial objects — the moon, a bright planet and two bright stars — will come together to form a "celestial ...

When most of us think about theweather on other planets, we imagine extreme conditions—boiling acid rain, methane snow, or ...

This Harley-Davidson took the world’s first motorcycle ride powered by solar fuel. The bike motored along the shores of Switzerland’s Lake Zurich thanks to a new type of sustainable energy.