Shuttle landing The Atlantis orbiter has touched down on Earth after a 13-day mission to cement Europe's position on the International Space Station (ISS).
The spacecraft and its crew installed the 12.8-tonne Columbus science lab, an achievement that makes Europe a full member of the $100bn platform project.
Atlantis landed at Florida's Kennedy Space Center at 1407 GMT.
Now that the shuttle is down, the US military will be allowed to shoot an ailing spy satellite out of the sky.
The missile firing, which is likely to take place over the Pacific Ocean, could not be carried out until after Atlantis had returned for fear the ship might encounter debris on its high-speed descent.
Nasa officials earlier reported that four small steering jets on Atlantis had failed, but they stressed these thrusters were not needed to help de-orbit the shuttle or control its glide through the atmosphere.
Riding home on Atlantis was US astronaut Dan Tani, who has been a long-stay resident on the ISS since October.
His place on the platform has been taken by Frenchman Leopold Eyharts who went up with the shuttle and who will spend the coming weeks commissioning the Columbus lab.
| | COLUMBUS SCIENCE LAB Total length - 6.8m Diameter - 4.5m Volume - 75 cu m Launch mass - 12.8t Operation - 3 crew Cabin temp - 16-27C Total power - 20kW Building Columbus Installing Columbus A Columbus tour |
The lab's installation means the European Space Agency (Esa) acquires "rights" under the space station project plan, principally to fly one European astronaut every two years to the platform for a six-month stay.
Columbus is booked for an extensive programme of research that will take in experiments from the life sciences, materials science, fluid physics and other disciplines.
Knowledge gained in the weightless conditions experienced on the platform are expected to aid the development of more advanced electronics, new alloys, novel drugs, and better crops, to name just a few examples.
In addition to fitting Columbus, the Atlantis crew replaced an empty nitrogen tank on the station and retrieved a failed control-moment gyroscope that is one of four such mechanisms used to keep the ISS pointing in the right direction.
The fuel sensor glitch experienced during recent launch campaigns seems to have been solved, and the shedding of shuttle tank insulation foam - the fatal flaw that downed Columbia and her crew in 2003 - has been minimised.
| | ATV - SPACE CARGO TRUCK Logistics ship will resupply the ISS with 4,860kg of cargo Deliveries to include science equipment, food and clothing Large tanks will transport vital air, water and fuel supplies ATV project's estimated cost is about 1.3bn euros (£0.9bn) At least four craft will follow the maiden ATV - Jules Verne Named after the author who wrote about fantastic journeys ATV flight animation |
Already, the Endeavour orbiter is on the launch pad at Kennedy ready for an 11 March flight.
Ten more shuttle flights will be required after its return, a manifest it looks set to shoulder along with the Discovery shuttle.
Atlantis, on current planning, has completed its ISS duties and is set for one last outing in August or September this year to service the Hubble Space Telescope However, Nasa says no final decision has been taken on Atlantis' immediate future.
For Europe, attention turns to its new space station logistics ship, known as the Automated Transfer Vehicle (ATV).
Dubbed "Jules Verne" for its maiden voyage, the ATV is entering final launch preparations at the European Kourou spaceport in French Guiana where it is expected to leave Earth on 8 March.
The ATV will haul just under five tonnes of cargo (food, water, fuel and experimental equipment) to the ISS.
Preliminary launch dates for shuttles in the rest of 2008:
- 11 March, Endeavour : to deliver the first part of the Japanese science complex known as Kibo and the Canadian Dextre robot to the ISS
- 24 April, Discovery : to loft the second and main component of the Japanese Kibo lab together with its exterior robot arm
- 28 August, Atlantis : a flight to service the Hubble Space Telescope
- 16 October, Endeavour : a cargo flight to the ISS using the Multi-Purpose Logistics Module in Endeavour's payload bay
- 4 December, Discovery : taking up the fourth starboard "backbone" segment for the ISS; and the fourth set of solar arrays and batteries
Because Atlantis will not be able to reach the space station if it gets into trouble, or is damaged, on its Hubble flight, the Endeavour orbiter will be made ready on the pad for a rescue mission in case it is needed.
Launch dates for the remaining seven flights in 2009/10 are under review. The crew of the space station is expected to rise from three to six in mid-2009.
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/7254675.stm
Published: 2008/02/20 14:11:03 GMT
© BBC MMVIII
No comments:
Post a Comment