Were they UFOs? Residents in the Hawaiian islands were alarmed when strange lights appeared in the sky Tuesday night, Hawaii News Now reports.

But Department of Defense officials quickly set the record straight: It was a missile launch from the Pacific Missile Range Facility at Barking Sands on Kauai.

“During the test, a simulated ballistic missile target was acquired, tracked, and engaged by the Aegis Weapon System,” a DOD official said. “Several fire control and engagement functions were exercised during the test.”

The Aegis Weapon System is intended to be a naval surface defense system, allowing ships to track and attack designated targets, according to its producer, Lockheed Martin. The Aegis Ballistic Missile Defense system, used in conjunction with the SPY-1 radar, allows fast-moving ships to intercept short and medium-range ballistic missiles.

Officials say the test was a success.

But these mysterious lights were never identified. Can you figure out what these “glowing orbs” are?