In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

The Hubble Space Telescope has provided the most detailed survey of the Andromeda galaxy, revealing new clues about its ...

Prior to the deadly collision, there had been a military aircraft-involved crash in Alaska on Tuesday. Officials said a U.S. Air Force F-35 fighter jet crashed in Alaska after the pilot managed to ...

Here's a look at how the tragedy unfolded, as the cause of the collision remains under investigation. Emergency response units assemble on the tarmac as search and rescue operations are underway ...

The helicopter, identified by the callsign PAT-25 —responded that it saw a passenger plane and that it would manuever out of the way ... Airport ahead of the collision. EarthCam Below is ...

A Black Hawk helicopter and an American Airlines plane collided within minutes of the chopper being instructed by air traffic control to “pass behind” the aircraft. Flights are once again ...

The investigation into the tragedy is ongoing.Through maps, videos, photos and radio transmissions, CNN is piecing together what occurred during the deadly, midair collision. Here is a timeline of ...

25.5 x 34 cm. (10 x 13.4 in.) ...