"As conditions worsened with eight to ten foot swells, the booster began to shift and ultimately was unable to remain upright", the company said Tuesday. "The safety of our team always takes precedence".
SpaceX doesn't expect future missions to be affected by the core's loss.
SpaceX usually employs a system known as the "Octagrabber" to secure recovered Falcon 9 boosters on the drone ship's deck, but that system couldn't be used this time around because the Falcon Heavy core booster had a different mechanical interface.
SpaceX didn't provide any information on the status of the booster core, including whether it will be retrieved at all.
After sending the Arabsat-6 telecommunications satellite on the first leg of its journey to geostationary orbit on Thursday, the three first-stage rocket cores went their separate ways. SpaceX has efficient robots created to recover its Falcon 9 boosters - the "octagrabber" - but the core booster had a different configuration that doesn't latch on to the base of any booster except the Falcon 9's (for now).
Falcon Heavy is reportedly the most powerful rocket in operation.
Falcon Heavy Flight 3 is now scheduled to launch the USAF STP-2 mission no earlier than late June, with current information available to a major customer with satellites aboard pointing towards NET June 22. It will be used for the next mission according to SpaceX. This anomaly also serves as a bit of an abrupt reminder of just how hard the safe landing and recovery of giant, orbital-class rocket boosters really is.
Bernie Sanders defends Ilhan Omar: She's not antisemitic
But, she added: "It's absolutely abhorrent the comments she continues to make and has made and (Democrats) look the other way". Sanders defended Omar's remarks by attacking Trump in a tweet, writing: " Ilhan Omar is a leader with strength and courage".
The payload fairings are clam shell-like nose cone halves that protect the craft's payload. The side stages touched down at Cape Canaveral Air Force Station's Landing Zones 1 and 2 while the core stage touched down on the ASDS.
Unbelievable sprint to win the Boston Marathon
But it's still a competition, and a little late-race drama among elite athletes certainly doesn't hurt the viewing experience. Following the race, Hasay posted a photo to Instagram that shows her crossing the finish line as her father pumps his fist.
Watch BTS Perform On 'SNL' : All Songs Considered
South Korean music phenomenon BTS have broken a brand new YouTube viewing record, just one week after the previous record was set. BTS has performed the track without Halsey previously, on the Saturday (April 13) episode of Saturday Night Live .
USA measles cases surge again as outbreak nears record
The city hasn't revealed all the information surrounding the current outbreak, including the number of cases, the suit claims. They added: "More than 20 million lives have been saved through measles vaccination since the year 2000 alone".