Early risers will be able to catch a celestial “smiley face” in the eastern predawn sky Friday morning, as Venus and Saturn align themselves with a skinny crescent moon to form a slightly off-kilter ...

In its quest to chart the evolution of the universe, ESA’s space telescope has already amassed a massive catalog of galaxies and gravitational lenses.

The school-bus-sized observatory launched on April 24, 1990 and overcame early setbacks to become one of the most ...