Thousands of spectators have been rewarded for their early wake-ups with a stunning display of hot air balloons across Canberra's skyline.

Hot air balloons inflate during the blue hour ... below the horizon but still provides enough light to make the sky appear ...

The appearance of a mysterious white object in the sky over northeastern Japan on Wednesday ... in the northeastern city of Sendai showed a balloon-like object above a cross, on which propellers ...

The pale sky was clear ... receding into a sea of blue, but it soon reached an altitude beyond the team’s ability to track with the naked eye. The High Altitude Balloon Experiments in Technology ...