The Delta IV Heavy is a powerful launch vehicle that was manufactured by United Launch Alliance (ULA). It was first launched in 2004 and is currently the world's third highest-capacity launch vehicle in operation.

The Delta IV Heavy is a powerful launch vehicle that was manufactured by United Launch Alliance (ULA). It was first launched in 2004 and is currently the world's third highest-capacity launch vehicle in operation.

The Delta IV Heavy was scheduled to be retired in 2024, with its final flight taking place on March 29, 2024. However, the launch was scrubbed due to technical issues and a new launch date has not been announced yet.

The Delta IV Heavy will be replaced by ULA's new Vulcan Centaur rocket, which has already had its first successful mission in January 2024.