The sky rumbled and the ground shook as the three most powerful hydrogen-fueled liquid rocket engines ever built successfully boosted a U.S. government satellite into orbit. Developed by Pratt & ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

The final United Launch Alliance (ULA) Delta IV Heavy rocket carrying the NROL-70 mission for the National Reconnaissance Office (NRO) lifts off from Space Launch Complex-37 on April 9 at 12:53 p.m.

After years of certification snags, the U.S. Space Force finally has its latest National Security Space Launch (NSSL) rocket. The newest branch of the U.S. armed forces on Tuesday launched United ...

CAPE CANAVERAL, Fla. — A U.S. spy satellite thundered toward orbit Saturday afternoon atop the most powerful rocket flying today, a 23-story Delta IV Heavy that blasted off from Cape Canaveral Air ...