A 'spaceplane' that flies 25 times faster than the speed of sound has successfully passed a crucial testing milestone.

Add to that 109 years, and last week's test flight of an airplane meant to travel at six times the speed of sound can seem an awful long way from the first flight of Orville and Wilbur Wright.

Correction: The headline has been changed to reflect the fact the Virgin Galactic spaceplane flew at twice the speed of sound, not the twice speed of light as previously stated.

Using quantum mechanical calculations to test the prediction, the team found that the speed of sound in solid atomic hydrogen is close to the theoretical fundamental limit.

The AFOSR–Notre Dame Large Mach 6 quiet hypersonic test facility, shown here, will help test the computations and theories regarding outstanding challenges of hypersonic travel during a project ...

The 846th Test Squadron of the U.S. Air Force has recovered a hypersonic sled used on the Holloman High Speed Test Track (HHSTT).

The speed of sound through air or any other gas, also known as Mach 1, can vary depending on two factors.

You might already know that in 1947, U.S. test pilot Chuck Yeager was the first person to break the sound barrier in a Bell X-1 named the Glamorous Glennis. But aircraft aren't the only things ...