Archive for the ‘Space Shuttle’ Category

Here’s something you’ll probably never see again: the space shuttle Atlantis landing at the Kennedy Space Center at the completion of mission STS-132. Atlantis had spent nearly two weeks in space, delivering supplies and a new research module to the International Space Station and conducting a few scientific experiments.

NASA’s wildly successful space shuttle program has only two more missions left before the fleet is retired. Mission STS-132 was Atlantis‘ final scheduled mission, and orbiters Endeavour and Discovery will each make their own trips to the International Space Station before the end of the year.

Thus, for only two more times will we see space shuttles launch from Cape Canaveral, and return home. And for only two more times will we be able to browse NASA’s audio files of the infamous “wake-up calls” used to rouse astronauts at the beginning of each day in outer space. Astronaut families choose one or two special songs to use to wake up the astronauts each morning. For Atlantis‘ final mission, “wake-up call” songs included “Sweet Home Alabama” (my favorite on the list) and the theme from Wallace and Gromit. You can find a full list of wake-up call songs from STS-132 here, and an index to all space shuttle mission wake-up calls (as well as mission images and videos) here.

Finally, watch Atlantis return home for the last time. I’m only sorry I missed seeing it live.

Image provided courtesy of NASA and Ben Cooper. Video provided courtesy of NASA.

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NASA has scheduled only three more space shuttle missions before the fleet is retired later this year. One mission each for the three remaining orbiters: Atlantis, Discovery, and Endeavour. Tomorrow, Atlantis will launch from Kennedy Space Center on its last mission: STS-132.

The six astronauts on board Atlantis are delivering supplies and parts to the International Space Station (ISS). In addition, the ISS is getting a new Russian-built laboratory module, christened Rassvet (“dawn”). Astronauts will also be delivering components for new experiments on the ISS, and conducting a few of their own on the shuttle.

One particular experiment, in partnership with scientists at the Rensselaer Polytechnic Institute, will study the growth of microbes in different microgravity habitats. Microscopic bacteria are all around us, and have been the most prevalent form of life on Earth for billions of years. In certain growth conditions, bacteria can form large, complex, three-dimensional communities called biofilms. Scientists are concerned that bacteria in microgravity environments could also form biofilms, and may impact the health of astronauts on long-term missions. Thus, biologists from Rensselaer Polytechnic Institute are sending up sealed vials of bacteria. During Atlantis‘ mission, astronauts will manipulate the growth conditions of some vials. Following the shuttle’s return to Earth, scientists will retrieve the vials and see how those different growth conditions affected the formation of biofilms in low gravity. Hopefully, the results of these experiments will help biologists minimize the potential threat of biofilms to astronaut health during longer missions in outer space.

These modest experiments are just at taste of what 30 years of space shuttle missions have delivered: countless scientific endeavors to help us venture further and further into outer space. As the space shuttle missions come to an end, we can only hope that the federal government will fund a future for manned space flight that makes the most of what we’ve learned so far, and will fuel progress for decades to come.

Atlantis launches tomorrow at 2:20PM EDT from Cape Canaveral. Watch it live! You’ll only have two more chances after tomorrow.

STS-132 mission patch provided courtesy of NASA.

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NASA’s Living With a Star Program is returning its first chunk of data. The Solar Dynamics Observatory spacecraft has beamed back its first breathtaking images of the sun as it begins its five year mission to study our closest star, a mere 93 million miles away.

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The space shuttle program ends this year.  Shuttles have been flying for over 30 years, but the whole program’s history — from hints and whispers to design and construction — really stretches back over half a century.

Before there was NASA, there was NACA. The National Advisory Committee for Aeronautics was formed in 1915 to organize, promote, and conduct aeronautical research. NACA (say the individual letters, not “naca” like we say “nasa”) conducted research in a variety of fields, including experiments to improve the efficiency of jet engines and break the sound barrier. By the mid-1950s, NACA scientists were designing the X-15, a reusable rocket-powered aircraft designed to reach the extreme upper regions of Earth’s atmosphere. Project members were hopeful that the X-15 designs could serve as the basis for a reusable spacecraft. A X-15-inspired spacecraft could be put into orbit using disposable rockets and then land like a conventional aircraft. A “spaceplane,” to use the tired term. In 1958, Congress folded NACA into its new space agency, NASA. The Mercury Project began, and any dreams of a reusable spaceplane were put on hold.

In the late 1960s, with the Apollo Program well underway (and about to put a man on the Moon), NASA began to look to the future. After humankind lands on the Moon, where should an agency with limited recourses go next? Some ideas included additional Moon missions, manned missions to Mars, and manned missions to low Earth orbit to research and develop technology and infrastructure (satellites, space stations, spacecraft). For that final point, a series of tests by the U.S. military had given the reusable spaceplane idea new life: some sort of reusable spaceplane orbiter (or shuttle), combined with some reusable and disposable external components to get the shuttle into orbit, could indeed be economically and technologically feasible. The design process for a shuttle orbiter began in earnest in 1969. In 1972, the Nixon administration made it official: NASA would develop a new “Space Transportation System” (STS) to put humankind into low Earth orbit.

In the final designs for the STS Program (as the space shuttle program was formally christened), NASA contracted private firms to build a small fleet of reusable orbiters (I’ll call them “shuttles” from here on) and a combination of reusable and disposable components to send those shuttles into low Earth orbit. The reusable components include two “space shuttle solid rocket boosters,” powerful rockets that provide the vast majority of the lift and thrust needed to get the shuttle off the launching pad. They propel the shuttle for about the first two minutes of flight, then detach and land in the ocean (they have parachutes), to be recovered later for future missions. The (usually orange) external fuel tank provides the shuttle’s three engines with liquid hydrogen fuel during launch. It detaches from the orbiter after the shuttle’s engines are shut off, and the external tank falls back to Earth, breaking up in the atmosphere. The shuttle itself carries the crew, their quarters, research labs, and cargo (known as the “payload”). The payload can be anything from a satellite (like the Hubble Space Telescope), cargo, or a heavy component like a module of the International Space Station. When it’s mission is complete, the shuttle re-enters the atmosphere, protected from intense heat and pressure by the tile-based heat shield system on its ventral surface, and lands on a (very long) runway like a conventional aircraft.

The subsequent history of the STS program is best summarized by a review of the shuttle fleet NASA built, some of the prominent STS missions, and the ultimate fate of each shuttle to date. All shuttles were given the designation “OV” (orbital vehicle) followed by three numbers. If the first number is a zero, then NASA intended the shuttle for tests, never an actual mission. A one indicates that the shuttle was intended for orbital flight. All space shuttle missions are given the designation “STS”, followed by a hyphen and then a number. I have included the STS number for those most notable (or tragic) missions:

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The above image shows Barack Obama, President of the United States, addressing approximately 200 members of a White House-sponsored conference on space exploration earlier today at the Kennedy Space Center in Cape Canaveral, Florida. President Obama used this address to formally announce his administration’s shift in priorities for NASA and deep space exploration. The audience of members of Congress, NASA officials, scientists, and former astronauts listened as the Mr. Obama reiterated previously leaked details, which involved abandoning many plans for space flight set up under President George W. Bush’s administration.

The shift is monumental. In a decision made some six years ago, NASA decided to retire the aging space shuttle fleet at the end of this year. With only 3 space shuttle flights left this year, all to hastily complete construction of the International Space Station (ISS), the ISS will have to rely on Russian rockets to ferry astronauts (including Americans) to and from the station starting in 2011. Under the George W. Bush administration, NASA launched the space shuttle’s replacement project: Constellation. Under the Constellation program’s goals, NASA would develop the necessary rockets, vehicles, and modules to continue to serve the ISS, return to the Moon, and then send them to Mars. NASA began to design, build, and test the Ares rockets to do the heavy lifting, and design the Orion space capsule that would be the focus of the Constellation program.

However, Constellation quickly fell behind schedule and over budget, and some critics questioned how returning to the Moon would not provide the necessary innovative leap NASA would need to venture out into deep space. Some independent commissions recommended scrapping Constellation altogether, while others called for focusing more on low Earth orbit missions and support missions to the ISS. Others bemoaned a future in space exploration where NASA abandons its efforts in manned space flights, and took a back seat to Russian, European, Japanese, and Chinese manned missions. Many also wondered anxiously what role private firms could play in the exploration of space. Thus, the details of President Obama’s plans for the Constellation program have been met with cheers and jeers alike. Here are the details, largely taken from today’s address:

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Space Shuttle Discovery lifts off from the Kennedy Space Center in Cape Canaveral, Florida at 6:21AM local time on Monday, 5 April 2010. This was only the 35th night launch of a space shuttle into orbit, and likely the last. Now in orbit, Discovery is on its way to the International Space Station. The shuttle will deliver food, supplies, and new scientific research tools and equipment to the station. Some of those tools include a new freezer for storing biological samples and an exercise platform that the space station crew can use to study muscle strength in a zero gravity environment. The shuttle crew will conduct at least three spacewalks to replace an external ammonia tank on the station. Ammonia is used to remove excess heat from inside the station and transfer it to radiators on the station’s exterior.

With just over one full day in space, the crew of 7 spent their day using Discovery‘s robotic arm to inspect the heat tiles on the orbiter’s ventral surface for possible damage. The array of tiles protects the orbiter and crew from the intense heat and pressure of atmospheric re-entry. This precautionary check of has been done on every shuttle mission after it was discovered that heat tile damage was responsible for the disintegration of the Space Shuttle Columbia during re-entry in 2003, killing all 7 astronauts on board. Discovery‘s crew recorded footage of the shuttle’s ventral surface, and will transmit the footage to mission control in Houston from the International Space Station. Discovery‘s own Ku-Band antenna, used for transmitting large data files (like these videos) is malfunctioning. But, the shuttle has numerous back-up communication systems, and the crew’s mission should be unaffected by this minor mission glitch.

This 131st space shuttle mission is only the third to include 3 women among the crew, including Japanese astronaut Naoko Yamazaki from the Japan Aerospace Exploration Agency (JAXA). There are only 3 remaining shuttle missions (one each for the 3 remaining orbiters), before the fleet is retired at the end of this year. You can read more about the space shuttle program here.

Image courtesy of NASA.

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Did you know NASA’s space shuttle program ends this year? There are only four scheduled missions left, all to the International Space Station.

One of those missions blasts off tomorrow: STS-131, using the Space Shuttle Discovery. You can read all about the mission and crew here. Take advantage while you can! After STS-131, there are only three space shuttle missions left.

Mission patch for STS-131, listing the names of the crew members and showing the space shuttle in the middle of a complicated “rendezvous pitch maneuver” to link up with the International Space Station, courtesy of NASA.

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