Hot air balloons flying.

Image of hot air balloons flying.

Image of hot air balloons flying.

Image of hot air balloons flying over landscape.

Image of hot air balloons.

Right side of DC-8 in mid-flight.

Image of Orion nebula using infrared imaging.

Wide-angle shot of NASA's Dryden hanger.

NASA's ER-2 plane in the hangar.

Underside of a FA-18 plane.

NASA's Chandra X-ray Observatory has discovered an extraordinary outburst by a black hole in the spiral galaxy M83, located about 15 million light years from Earth. Using Chandra, astronomers found a new ultra-luminous X-ray source, or ULX. These objects give off more X-rays than most normal binary systems in which a companion star is in orbit around a neutron star or black hole.

Image of a supernova taken using x-ray imaging.

Image of autonomous aerial refueling.

Image of a 747 transporting the space shuttle Discovery.

30 Doradus, i.e. the Tarantula nebula.

Side view of NASA's DC-8 in front of mountains.

Image of a NASA rocket shortly after launch.

X-ray image of the Milky Way.

Visible spectrum image of the Milky Way.

Infrared image of the Milky Way.

The Flame Nebula.

Image of flames after a NASA rocket launch.

The Flame Nebula.

Satellite image of the Petermann glacier.

A cluster of hot air balloons.