A street artists chalks a portrait of the late Pope Francis outside the Cathedral in Buenos Aires, Argentina Monday, April 21 ...

The Hubble Space Telescope launched on April 24, 1990, aboard the Space Shuttle Discovery (STS-31), and deployed into Earth ...

Pope Francis appears on the central lodge of St. Peter’s Basilica to bestow the Urbi et Orbi (Latin for to the city and the ...

The iconic Earthrise image of our planet rising above the lunar horizon, taken in 1968 by astronauts aboard the Apollo 8 mission, is widely credited with fueling the environmental movement that led to ...