Photos: Delta 4 rocket fires off the pad before sunset

A small satellite launcher built by Astra “experienced an anomaly” Monday on a launch pad at Kodiak Island, Alaska, forcing the cancellation of a planned orbital launch attempt this week, according to the company’s co-founder and CEO.

An Orbital ATK Minotaur 4 rocket partially powered by modified motors from a Cold War-era nuclear missile lifted off early Saturday from Cape Canaveral with a small U.S. military satellite to help track other objects in space. The solid-fueled launcher took off at 2:04 a.m. EDT (0604 GMT) after a weather delay.

SpaceX launched 60 more Starlink Internet satellites Wednesday aboard a Falcon 9 rocket. Liftoff from pad 39A occurred at 3:30 p.m. EDT (1930 GMT), and the Falcon 9’s previously-flown first stage successfully landed on SpaceX’s offshore drone ship.