"Ships en route to rescue Falcon", he wrote.
SpaceX is contracted to carry out resupply missions to the ISS through 2024 using the Falcon 9 launch vehicle and Dragon spacecraft.
After separating from the second stage, and firing its engines to return to Earth, a video camera on board showed the first stage spinning.
In the end, the engineers at SpaceX have taken the booster from the land.
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The launch itself was a success, but landing the rocket for reuse didn't go as planned. After the lift-off, everything went as per the plan including the crucial part where it effectively propelled the cargo-laden Dragon capsule towards the worldwide space station.
SpaceX has a contract to ferry American astronauts to the space station as part of what's known as the Commercial Crew program with NASA, but the timeline for the first flights has slipped repeatedly.
"Grid fin hydraulic pump stalled, so Falcon landed just out to sea", SpaceX CEO Elon Musk said in a tweet after the missed landing. Hans claimed that the water landing was pretty much smooth and today's incident showed how SpaceX's rocket are created to save itself in case if anything goes wrong.
"It seems that the stage is not damaged and is sending data". The mice and their habitat were loaded into spacecraft shortly before launch, but the spoiled food had to be replaced ahead of launch.