![Delta IV Heavy Smoke Trail After The Launch](https://www.popsci.com/wp-content/uploads/2019/03/18/UWGGDM2PHDYG7VRB6EWMOOV344.jpg?w=2560)
![Delta IV Heavy Smoke Trail After The Launch](https://www.popsci.com/wp-content/uploads/2019/03/18/UWGGDM2PHDYG7VRB6EWMOOV344.jpg?w=2560)
![Delta IV Heavy on a launch pad with the sun setting in the background](https://www.popsci.com/wp-content/uploads/2019/03/18/E2KO5JWDD6DKC2SHZ3F5I6BPQU.jpg?strip=all&quality=95)
Last weekend, a United Launch Alliance Delta IV Heavy rocket hurtled a mysterious payload into orbit. The classified cargo, delivered on behalf of the National Reconnaissance Office, is possibly a spy satellite, though we may not know for years or more what it actually was. What we can do is bask in the beauty of a rocket hurtling an enigma into orbit.
Read about the project’s weird logo, watch Saturday’s launch, and enjoy the photos below:
![Delta IV Heavy Rocket Waiting on a launch pad In Daylight](https://www.popsci.com/wp-content/uploads/2019/03/18/SXYXXBY22OEWMWQ2LWJPYXD5VU.jpg?strip=all&quality=95)
![Delta IV Heavy Blastoff from the launch pad](https://www.popsci.com/wp-content/uploads/2019/03/18/BR2GL72ZB2ZY4PWUXURP6WN3CQ.jpg?strip=all&quality=95)
![Delta IV Heavy In The Air After The Launch](https://www.popsci.com/wp-content/uploads/2019/03/18/T36OAMQHPWIJ7P6EQX6CRTPNMY.jpg?strip=all&quality=95)