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| SpaceX finally manages to land re-usable rocket onto a barge, after dropping off supplies at International Space Station | SpaceX finally manages to land re-usable rocket onto a barge, after dropping off supplies at International Space Station |
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| SpaceX has finally managed to safely land its re-usable rocket onto a barge, after previous repeated attempts saw the Falcon 9 kit explode. | SpaceX has finally managed to safely land its re-usable rocket onto a barge, after previous repeated attempts saw the Falcon 9 kit explode. |
| Successfully landing the booster onto the large "drone ship" is a huge step forward for SpaceX and its found Elon Musk, and for private space travel more generally. The company hopes that the re-usable rockets will make space travel much cheaper in future, since they can be re-filled and then sent back into space rather than re-building from scratch. | Successfully landing the booster onto the large "drone ship" is a huge step forward for SpaceX and its found Elon Musk, and for private space travel more generally. The company hopes that the re-usable rockets will make space travel much cheaper in future, since they can be re-filled and then sent back into space rather than re-building from scratch. |
| Mr Musk celebrated the successful landing by referencing the T-Pain song "I'm On A Boat". He later deleted the tweet. | Mr Musk celebrated the successful landing by referencing the T-Pain song "I'm On A Boat". He later deleted the tweet. |
| The Falcon 9 rocket successfully landed after completing a Nasa cargo run to the International Space Station — another significant event, as those resupply missions have been paused since an accident in June 2015 destroyed a full rocket's payload. | The Falcon 9 rocket successfully landed after completing a Nasa cargo run to the International Space Station — another significant event, as those resupply missions have been paused since an accident in June 2015 destroyed a full rocket's payload. |
| About 3 minutes after Friday's launch, the main part of the 23-story tall, two-stage SpaceX rocket separated, turned around and headed toward a landing platform floating in the Atlantic about 185 miles northeast of Cape Canaveral. | About 3 minutes after Friday's launch, the main part of the 23-story tall, two-stage SpaceX rocket separated, turned around and headed toward a landing platform floating in the Atlantic about 185 miles northeast of Cape Canaveral. |
| A live video feed broadcast on NASA television showed the rocket booster, its four landing legs extended, descending over the ocean before settling itself upright on the barge-like platform, roughly eight minutes after launch. | A live video feed broadcast on NASA television showed the rocket booster, its four landing legs extended, descending over the ocean before settling itself upright on the barge-like platform, roughly eight minutes after launch. |
| "The rocket landed instead of putting a hole in the ship — or tipping over — so we're really excited about that," SpaceX founder and chief executive Elon Musk told reporters at the Florida launch site. | "The rocket landed instead of putting a hole in the ship — or tipping over — so we're really excited about that," SpaceX founder and chief executive Elon Musk told reporters at the Florida launch site. |
| His employees gathered outside the company's glassed-in mission control in Hawthorne, California, cheered wildly, jumped up and down, and chanted, "USA, USA, USA!" when the booster touched down. President Barack Obama later chimed in via Twitter, praising SpaceX as an innovator. | His employees gathered outside the company's glassed-in mission control in Hawthorne, California, cheered wildly, jumped up and down, and chanted, "USA, USA, USA!" when the booster touched down. President Barack Obama later chimed in via Twitter, praising SpaceX as an innovator. |
| Bigelow Aerospace, the Nevada company behind the equally innovative inflatable compartment bound for the space station, offered congratulations for the "beautiful launch and barge landing." | Bigelow Aerospace, the Nevada company behind the equally innovative inflatable compartment bound for the space station, offered congratulations for the "beautiful launch and barge landing." |
| Although SpaceX managed to land a spent booster rocket on the ground at Cape Canaveral in December, touchdowns at sea had proven elusive, with several attempts over the past year ending in explosions on the barge. | Although SpaceX managed to land a spent booster rocket on the ground at Cape Canaveral in December, touchdowns at sea had proven elusive, with several attempts over the past year ending in explosions on the barge. |
| Musk's goal is to make rockets as reusable as airplanes and as cost-effective, too. He hopes to reuse this particular booster in June on another orbital flight, following 10 test firings on the pad. | Musk's goal is to make rockets as reusable as airplanes and as cost-effective, too. He hopes to reuse this particular booster in June on another orbital flight, following 10 test firings on the pad. |
| SpaceX stands to save tens of millions of dollars per flight, Musk said, by recycling the boosters. He's looking forward to the day when booster landings become boring: "So when it's like, 'Oh yeah, another landing, OK, no news there.' That's actually when it will be successful." | SpaceX stands to save tens of millions of dollars per flight, Musk said, by recycling the boosters. He's looking forward to the day when booster landings become boring: "So when it's like, 'Oh yeah, another landing, OK, no news there.' That's actually when it will be successful." |
| Sea touchdowns are actually quite tricky, Musk said, since the targets are relatively small — about the size of a football field — and bobbing in the waves. The boosters will need to land at sea, versus the shore, when they are traveling too fast and using too much fuel to get their spacecraft into super-high orbits — or out of Earth's orbit altogether. | Sea touchdowns are actually quite tricky, Musk said, since the targets are relatively small — about the size of a football field — and bobbing in the waves. The boosters will need to land at sea, versus the shore, when they are traveling too fast and using too much fuel to get their spacecraft into super-high orbits — or out of Earth's orbit altogether. |
| Blue Origin, run by another high-tech billionaire, Jeff Bezos, successfully has landed his rockets in West Texas in recent months, but those flights were suborbital and therefore not flying nearly as fast or high as the SpaceX Falcon. | Blue Origin, run by another high-tech billionaire, Jeff Bezos, successfully has landed his rockets in West Texas in recent months, but those flights were suborbital and therefore not flying nearly as fast or high as the SpaceX Falcon. |
| This marks SpaceX's first shipment for the space station in a year. Its last delivery attempt in June ended in flames after just two minutes, doomed by a snapped strut in the oxygen tank of the upper stage. The company resumed Falcon launches late last year with satellites. | This marks SpaceX's first shipment for the space station in a year. Its last delivery attempt in June ended in flames after just two minutes, doomed by a snapped strut in the oxygen tank of the upper stage. The company resumed Falcon launches late last year with satellites. |
| The Dragon and its 7,000 pounds of freight — including the attention-grabbing payload — should reach the space station Sunday. | The Dragon and its 7,000 pounds of freight — including the attention-grabbing payload — should reach the space station Sunday. |
| Bigelow Aerospace's expandable compartment will swell to the size of a small bedroom, once inflated next month. It's a testbed for orbiting rental property that the Nevada company hopes to launch in four years, and also for moon and Mars habitats. | Bigelow Aerospace's expandable compartment will swell to the size of a small bedroom, once inflated next month. It's a testbed for orbiting rental property that the Nevada company hopes to launch in four years, and also for moon and Mars habitats. |
| Traffic has been heavy lately at the 260-mile-high complex. NASA's other commercial shipper, Orbital ATK, made a delivery at the end of March, then Russia just last weekend. SpaceX's Dragon will join three cargo carriers and two crew capsules already parked there. | Traffic has been heavy lately at the 260-mile-high complex. NASA's other commercial shipper, Orbital ATK, made a delivery at the end of March, then Russia just last weekend. SpaceX's Dragon will join three cargo carriers and two crew capsules already parked there. |
| Besides a bevy of biological experiments — including 20 mice for a muscle study, and cabbage and lettuce plants for research as well as crew consumption — the Dragon capsule holds the pioneering pod. | Besides a bevy of biological experiments — including 20 mice for a muscle study, and cabbage and lettuce plants for research as well as crew consumption — the Dragon capsule holds the pioneering pod. |
| The Bigelow Expandable Activity Module, or BEAM, will be attached to the space station in about a week, but won't be inflated until the end of May. | The Bigelow Expandable Activity Module, or BEAM, will be attached to the space station in about a week, but won't be inflated until the end of May. |
| BEAM is a 21st-century reincarnation of NASA's TransHab, which never got beyond blueprints and ground mock-ups in the 1990s. Hotel entrepreneur Robert Bigelow bought rights to TransHab, then persuaded NASA to host BEAM at the space station. | BEAM is a 21st-century reincarnation of NASA's TransHab, which never got beyond blueprints and ground mock-ups in the 1990s. Hotel entrepreneur Robert Bigelow bought rights to TransHab, then persuaded NASA to host BEAM at the space station. |
| Empty except for sensors, the experimental BEAM is Bigelow's first soft-sided space structure meant for people. Astronauts will enter periodically during the two years it's at the station. | Empty except for sensors, the experimental BEAM is Bigelow's first soft-sided space structure meant for people. Astronauts will enter periodically during the two years it's at the station. |
| Bigelow hopes to have two station-size inflatables ready to launch around 2020 for commercial use, potentially followed by inflatable moon bases. NASA, meanwhile, envisions using inflatable habitats during 2030s Mars expeditions. | Bigelow hopes to have two station-size inflatables ready to launch around 2020 for commercial use, potentially followed by inflatable moon bases. NASA, meanwhile, envisions using inflatable habitats during 2030s Mars expeditions. |
| On the eve of the launch, Bigelow said the mission promises to "change the entire dynamic for human habitation." | On the eve of the launch, Bigelow said the mission promises to "change the entire dynamic for human habitation." |
| As does the booster landing for the future of spaceflight, Musk said. | As does the booster landing for the future of spaceflight, Musk said. |
| "It's another step toward the stars. In order for us to really open up access to space, we've got to achieve full and rapid reusability," he said. | "It's another step toward the stars. In order for us to really open up access to space, we've got to achieve full and rapid reusability," he said. |
| Musk said it will take a few years to make the landing process smooth and efficient, and failures likely will occur, "but I think it's proven that it can work." | Musk said it will take a few years to make the landing process smooth and efficient, and failures likely will occur, "but I think it's proven that it can work." |
| Additional reporting by agencies | Additional reporting by agencies |