SpaceX launched a secret satellite codenamed Zuma on Sunday night.
Last year was a banner year for SpaceX, with 18 launches.
This launch also included a recovery of the first stage booster used with the Falcon 9, which returned to Cape Canaveral and landed at its LZ-1 landing pad after deploying and separating from the second stage.
Neither SpaceX nor the U.S. military have disclosed the objective of the Zuma craft, but the news site says the satellite was created by aerospace firm Northrop Grumman.
For example, SpaceX's launch of a top-secret space drone last September was disclosed as a Boeing (BA) X-37B for the Air Force.
IBD'S TAKE: A new Space Age is dawning as billionaires like Elon Musk and Amazon's Jeff Bezos look to explore deeper into the final frontier and make space exploration and commercial development more affordable.
The unmanned Falcon rocket blasted off from Cape Canaveral on time at 8 p.m. with a brilliant flame visible for hundreds of miles. Such landings are vital to the company as they are being performed to improve the development of its reusable rockets.
Aerospace company SpaceX is all set to launch world's most powerful rocket - Falcon Heavy - by the end of January this year.