The era of Delta Heavy IV is coming to an end.
For the last 64 years, United Launch Alliance's (ULA's) heavy-lift rocket has led an impressive career lofting large payloads into space. However, the rocket is scheduled to lift off one last time when it launches from Space Launch Complex-37 at Cape Canaveral Space Force Station in Florida. The launch was originally planned for Thursday afternoon (March 28), but ULA called that try off due to a technical issue a few minutes before liftoff. The company is now targeting today (April 9) at 12:53 p.m. EDT (1653 GMT) for the landmark launch.