The crew of STS-133 will have to wait a little longer for their date with destiny - this time thanks to weather. Photo Credit: NASA/Kim Shiflett
[/caption]
Discovery’s final flight faced its first hurdle in the form of a fuel leak in its right OMS pod. This problem seemed solved, but using an over-abundance of caution mission managers had the seals around the affected flange replaced. Then unrelated leaks of hydrogen and helium pushed the launch back to Nov. 2 and then Nov. 3. With that problem resolved many thought Discovery’s problems were behind her – enter a voltage issue in the number three engine’s backup control system. This conspired to push the launch back to Nov. 4.
However, in the early morning hours of Nov. 4 it was obvious that Florida’s turbulent weather would not allow a launch on this day and mission managers scrubbed the launch for at least 24 hours. Weather for Friday shows a 70 percent chance of favorable conditions. If Discovery does launch tomorrow, it will take place at 3:04 p.m. EDT.
Discovery’s final mission, STS-133, will deliver the Leonardo Multipurpose Module (PMM) with its cargo – including the first humanoid robot to be sent into space – Robonaut-2 (R2). Also riding along on this mission is the Express Logistics Carrier-4 and spare parts. Like the other remaining shuttle flights, these new components and supplies are designed to leave the space station better prepared for when the space shuttles are retired next year.
The crew of STS-133 will be comprised of Commander Steve Lindsey, Pilot Eric Boe and Mission Specialists; Alvin Drew, Nicole Stott, Tim Kopra and Michael Barratt. All of these astronauts are space flight veterans.
Discovery on the launchpad. Credit: Alan Walters (awaltersphoto.com) for Universe Today
[/caption]
UPDATE: Discovery has been cleared for a launch attempt on Nov. 4 at 3:29:43 p.m. EDT. After a review, NASA managers decided the electrical glitch that prompted a 24-hour delay was not a threat to flight safety. The only problem now is that the weather report calls for rain and clouds, and gave an 80% chance for conditions that would prohibit launch. We’ll keep you updated.
A power controller on space shuttle Discovery’s main engine number three failed to start during routine checks this morning causing shuttle managers to push the final launch of Discovery back at least 24 hours to Nov. 4. Engineers began troubleshooting the problem – when it appeared to correct itself. Circuit breakers have had problems like this before. However, NASA mission managers wanted to make sure they fully understood what was causing the problems.
“We make sure we truly understand the risk before we fly,” said Mike Moses, Mission Management Team Chair. “The problem is pretty simple and we wanted to make sure we’re not to aggressive on our response.”
Teams will work through the night and into Wednesday morning on this problem. To remove the affected circuit is a fairly invasive procedure and some of the circuits involved cannot be retested on the launch pad. If the launch does not occur Thursday NASA has until Sunday to launch before the launch window closes. Currently, Discovery is set to launch Thursday, Nov. 4 at 3:29 p.m. EDT.
From a crew perspective it made sense to take an additional 24 hours,” said Mike Leinbach, Shuttle Launch Director. “We’ll pick back up with our launch countdown on Thursday morning.”
Discovery is set to launch on her final, 11-day mission to the International Space Station on mission STS-133. The crew of Discovery consists of Commander Steve Lindsey, Pilot Eric Boe and Mission Specialists; Alvin Drew, Nicole Stott, Tim Kopra and Michael Barratt. The payload for this mission is the Leonardo Permanent Multipurpose Module which houses among other things the first humanoid robot to fly into space – Robonaut-2. Also onboard is the Express Logistics Carrier-4 and much-needed spare parts.
The Alcubierre drive is one of the better known warp drive on paper models – where a possible method of warp drive seems to work mathematically as long as you don’t get too hung up on real world physics and some pesky boundary issues.
Recently the Alcubierre drive concept has been tested within mathematically modeled metamaterial – which can provide a rough analogy of space-time. Interestingly, in turns out that under these conditions the Alcubierre drive is unable to break the light barrier – but quite capable of doing 25% of light speed, which is not what you would call slow.
OK, so two conceptual issues to grapple with here. What the heck is an Alcubierre drive – and what the heck is metamaterial?
The Alcubierre drive is a kind of mathematical thought experiment where you imagine your spacecraft has a drive mechanism capable of warping a bubble of space-time such that the component of bubble in front of you contracts bringing points ahead of you closer – while the bubble behind you expands, moving what’s behind you further away.
This warped geometry moves the spacecraft forward, like a surfer on a wave of space-time. Maintaining this warp dynamically and continuously as the ship moves forward could result in faster-than-light velocities from the point of view of an observer outside the bubble – while the ship hardly moves at all relative to the local space-time within the bubble. Indeed throughout the journey the crew experience free fall conditions and are not troubled by G forces.
Standard images used to describe the Alcubierre drive. Left: Want to make the Kessel run in 12 parsecs? No problem - just compress the Kessel run into 12 parsecs. Right: The Alcubierre concept can be thought of as a spaceship surfing on a wave of space-time. Images sourced from daviddarling.info.
Some limitations of the Alcubierre drive model are that although the mathematics can suggest that forward movement of the ship is theoretically possible, how it might start and then later stop at its destination are not clear. The mechanism underlying generation of the bubble also remains to be explained. To warp space-time, you must redistribute mass or energy density in some way. If this involves pushing particles out to the edges of the bubble this risks a situation where particles at the boundary of the bubble would be moving faster than light within the frame of reference of space-time external to the bubble – which would violate a fundamental principle of general relativity.
There are various work-around solutions proposed, involving negative energy, exotic matter and tachyons – although you are well down the rabbit-hole by this stage. Nonetheless, if you can believe six impossible things before breakfast, then why not an Alcubierre drive too.
Now, metamaterials are matrix-like structures with geometric properties that can control and shape electromagnetic waves (as well as acoustic or seismic waves). To date, such materials have not only been theorized, but built – at least with the capacity to manipulate long wavelength radiation. But theoretically, very finely precisioned metamaterials might be able to manipulate optical and shorter wavelengths – creating the potential for invisibility cloaks and spacecraft cloaking devices… at least, theoretically.
Anyhow, metamaterials capable of manipulating most of the electromagnetic spectrum can be mathematically modeled – even if they can’t be built with current technologies. This modeling has been used to create virtual black holes and investigate the likelihood of Hawking radiation – so why not use the same approach to test an Alcubierre warp drive?
It turns out that the material parameters of even so-called ‘perfect’ metamaterial will not allow the Alcubierre drive to break light speed, but will allow it to achieve 25% light speed – being around 75,000 kilometres a second. This gets you to the Alpha Centauri system in about seventeen years, assuming acceleration and deceleration are only small components of the journey.
Whether the limitations imposed by metamaterial in this test are an indication that it cannot adequately emulate the warping of space-time – which the Alcubierre drive needs to break light speed – or whether the Alcubierre drive just can’t do it, remains an open question. What’s surprising and encouraging is that the drive could actually work… a bit.
Quite a few things going on in the human spaceflight world, so will just post a few briefs:
Of course top on the agenda is that space shuttle Discovery is scheduled to lift-off on its last flight ever, for the STS-133 mission. Launch is scheduled for Monday, Nov. 1 at 4:40 p.m. EDT from Launch Pad 39A. The faulty fuel line that threatened to delay the mission has been fixed, so everything is go for the oldest of the shuttle fleet’s final mission, a trip to the International Space Station to bring up Robonaut 2 and a new module. We’ll keep you posted for the latest on launch day.
A Progress resupply ship launched to the ISS just yesterday, Oct. 27, and will meet up with the ISS in 3 days. It is carrying 2 tons of food, fuel and supplies for the Expedition 25 crew, and should dock at the Pirs Docking Compartment on Oct. 30. Watch the video of the launch below.
Discovery returns to Earth with the crew of STS-29. Robert Springer was a member of this crew and recently sat down and gave his thoughts about the end of the shuttle era. Photo Credit: NASA
[/caption]
As he looks back over the years, former shuttle astronaut Robert Springer remembers the shuttle era very clearly. He flew on Atlantis – and Discovery. With the final flight of Discovery only a few days away, he took time out of his busy schedule to reminisce about his time ‘riding rockets.’
“Great memories,” Springer said, “I’m really proud of the opportunity I had and the chance to serve my country, and so it was was special — very special.”
Springer received his aviator’s wings in 1966 with the United States Marine Corps. He flew F-4 Phantoms in Vietnam where he also served as an advisor to the South Korean Marine Corps. Springer would fly some 300 combat missions in F-4s and an additional 250 combat missions in O-1 Bird Dogs, UH-1 “Hueys.” Springer would eventually attend navy Fighter Weapons School – known more commonly as “TOPGUN.” Springer has been awarded numerous awards including the Navy Distinguished Flying Cross and the Bronze Star.
He was selected to become an astronaut in 1980, completing training one a year later in 1981. He served on the support crew for STS-3 working on various aspects of the “Canadarm” remote manipulator system. Between 1984 and 1985 he served as CAPCOM on seven shuttle flights. After waiting nine years he flew his first mission in 1989 aboard Discovery on STS-29.
Crew portrait with Springer in the middle of the top row. Image Credit: NASA
STS-29 was a highly-successful mission that deployed a Tracking and Data Relay Satellite (TDRS) and conducted numerous experiments while on orbit. A year later in 1990 Springer again left Earth for the black sky on STS-38. This mission was aboard Atlantis and was a classified Department of Defense mission. It was the first mission to land at Kennedy Space Center in Florida since 1985. Of the two missions, Springer remembers STS-38 with a bit of a smile.
“My first flight on STS-29 was shortly after the first Return-to-Flight in 1988 and while the media attention was nice, once is enough,” Springer said. “So for STS-38 we were completely cut off from the press – it was fantastic! I just felt kind of bad for the new guys on that flight as they missed that aspect of a shuttle mission.”
When speaking with Springer, you can see the smile fade somewhat when the subject turns to the final flight of Discovery, arguably the most historic of the surviving orbiters.
“It’s going to be a little tough, realizing that this will be the last time that Discovery will be going into space,” Springer said while looking out at Launch Complex 39a. “You know that someday that the program is going to come to an end, but to actually have that take place and come to fruition, while exciting to see it launch – it will be sad.”
He fondly recollected his experience on board Discovery as one of the most amazing experiences in a career that has witnessed some of the most powerful experiences in American history.
“The flight overall was fantastic, it was so incredibly intense,” Springer said with a smile. “We were one of the first flights after the Challenger accident. While we normally plan for a 16 hour day during missions, we were so busy it ended up being an 18 hour day. Whenever we had a free minute we would hog the windows and stare out into space until you couldn’t fight it anymore and you’d drift off to sleep – and around the shuttle cabin.”
NASA's Ames Center Director, Simon "Pete" Worden has announced that development of next-generation propulsion technologies are underway. Image Credit: NASA
[/caption]
The Director of NASA’s Ames Center, Pete Worden has announced an initiative to move space flight to the next level. This plan, dubbed the “Hundred Year Starship,” has received $100,000 from NASA and $ 1 million from the Defense Advanced Research Projects Agency (DARPA). He made his announcement on Oct. 16. Worden is also hoping to include wealthy investors in the project. NASA has yet to provide any official details on the project.
Worden also has expressed his belief that the space agency was now directed toward settling other planets. However, given the fact that the agency has been redirected toward supporting commercial space firms, how this will be achieved has yet to be detailed. Details that have been given have been vague and in some cases contradictory.
The Ames Director went on to expound how these efforts will seek to emulate the fictional starships seen on the television show Star Trek. He stated that the public could expect to see the first prototype of a new propulsion system within the next few years. Given that NASA’s FY 2011 Budget has had to be revised and has yet to go through Appropriations, this time estimate may be overly-optimistic.
One of the ideas being proposed is a microwave thermal propulsion system. This form of propulsion would eliminate the massive amount of fuel required to send crafts into orbit. The power would be “beamed” to the space craft. Either a laser or microwave emitter would heat the propellant, thus sending the vehicle aloft. This technology has been around for some time, but has yet to be actually applied in a real-world vehicle.
The project is run by Dr. Kevin L.G. Parkin who described it in his PhD thesis and invented the equipment used. Along with him are David Murakami and Creon Levit. One of the previous workers on the program went on to found his own company in the hopes of commercializing the technology used.
For Worden, the first locations that man should visit utilizing this revolutionary technology would not be the moon or even Mars. Rather he suggests that we should visit the red planet’s moons, Phobos and Deimos. Worden believes that astronauts can be sent to Mars by 2030 for around $10 billion – but only one way. The strategy appears to resemble the ‘Faster-Better-Cheaper’ craze promoted by then-NASA Administrator Dan Goldin during the 1990s.
DARPA is a branch of the U.S. Department of Defense whose purview is the development of new technology to be used by the U.S. military. Some previous efforts that the agency has undertaken include the first hypertext system, as well as other computer-related developments that are used everyday. DARPA has worked on space-related projects before, working on light-weight satellites (LIGHTSAT), the X-37 space plane, the FALCON Hypersonic Cruise Vehicle (HCV) and a number of other programs.
The Defense Advanced Research Projects Agency or DARPA has been involved with a number of advanced technology projects. Image Credit: DARPA
The crew of STS-133 discusses their perspectives on the final flight of space shuttle Discovery with the media. Photo Credit: Universe Today/awaltersphoto.com
[/caption]
The crew for the last mission for space shuttle Discovery spent the week at NASA’s Kennedy Space Center conducting the Terminal Countdown Demonstration Test or as it is more commonly know – TCDT. The crew arrived Tuesday, Oct. 12 and immediately set to work. This week of training is the last major milestone on the path to launch, currently scheduled to take place on Nov. 1 at 4:40 p.m. EDT.
TCDT consists of is training that simulates the final hours up until launch. This provides training for both the crew and the launch team. The launch team practices launch day timelines as well other, crucial flight-day procedures. The crew on the other hand went through a number of exercises that included:
• Rescue training – The astronauts will run through several simulations where they practice what to do in the event of an emergency. The crew will be instructed on how to use the emergency baskets that will allow them to escape the launch pad in case there is a fire. They will also learn how to operate the tank-like M113 personnel carrier and other emergency equipment.
• The commander in pilot will perform abort landings and other flight aspects in the Shuttle Training Aircraft (STA). The plane is a Grumman Gulfstream II and it duplicates the shuttle’s approach profile and many of the orbiter’s handling qualities.
• Conduct a launch day simulation that includes everything that will happen on launch day – except the launch. The crew walked out in their bright orange launch and entry suits. TCDT also includes a simulated abort so that the crew is well-versed as to what do to in case of that scenario.
STS-133 crew members arrive at NASA's Kennedy Space Center in their sleek T-38 jets. Photo Credit: Universe Today/awaltersphoto.com
These activities allow the crew and flight teams to do a rehearsal of all the events that will take place on launch day.
“This is a dress rehearsal for the real flight so the crew is kind of peaked up; they’ve put all the sequence of events together, when they go out to the pad they’ll do everything except igniting the main engines,” said Robert Springer a two-time shuttle veteran. “It’s a chance to review all your procedures and make sure everything is in place.”
The crew of STS-133 consists of Lindsey, Pilot Eric Boe and Mission Specialists, Michael Barratt, Tim Kopra, Alvin Drew and Nicole Stott. The crew is comprised entirely of space flight veterans.
NASA's official crew portrait of the crew of STS-133. Image Credit: NASA[
STS-133 is an 11-day mission to the International Space Station (ISS) to deliver the Leonardo Permanent Multipurpose Module (PMM) which contains, among other thing, the first humanoid robot to fly into space – Robonaut-2 (R2). Also onboard is the Express Logistics Carrier-4 and spare parts for the orbiting laboratory.
Springer’s first flight was on space shuttle Discovery and as he watched the crew for her final mission his thoughts reflected on his experiences and the end of the shuttle era.
“It’s going to be a little tough, my personal experiences that I have of Discovery and my memories that I have of that time make it a little bittersweet to realize that this will be the last time that Discovery will go into space.”
X37-B spaceplane captured in orbit in May 2010 by UT reader Brent 'Bozo.'
[/caption]
Here’s an update on the US Air Force’s secret X-37B space plane, which went missing last week — at least for us Earth-bound satellite watchers (surely the Air Force knows exactly where it is!). Spaceweather.com reports that the plane has been spotted again by a skywatcher from South Africa, Greg Roberts on October 12. Spaceweather says, “An analysis of the sighting by satellite expert Ted Molczan suggests that the X-37B has maneuvered into an orbit 54 km lower than before.” This is at least the second time the space plane’s orbit has changed, but at least we now know it is still in orbit and hasn’t landed.
Here’s some exclusive video of the first glide flight of SpaceShipTwo earlier this week, shared by the National Geographic Channel, which has a new documentary series about Virgin Galactic premiering Monday, October 18, at 10 p.m. ET/PT. (Check your local listings at the Nat Geo Channel website). The series will cover maverick entrepreneur Sir Richard Branson and legendary aeronautical engineer Burt Rutan as they strive to be first to make space tourism an everyday reality. Also included in the premiere episode will be the backstory of the venture, including Rutan’s win of the Ansari X Prize with SpaceShipOne and WhiteKnightOne.
National Geographic Channel also shared a few images from Sunday’s flight, below.
Baumgartner, left with Joe Kittinger. Credit: Red Bull Stratos
[/caption]
An attempt to reach supersonic speeds during freefall has hit a snag as a promoter who says the stunt was originally his idea has filed a lawsuit against the Red Bull Stratos team. Daniel Hogan claims he pitched the idea of breaking a 50-year old freefall record to Red Bull in 2004, and that Red Bull said they weren’t interested, but later, the company went forward with the idea. Hogan has filed a multi-million dollar lawsuit against the energy drink company, prompting Red Bull to stand down with the record-breaking attempt until the issue can be resolved.
Red Bull issued this statement today:
“Despite the fact that many other people over the past 50 years have tried to break Colonel (Ret.) Joe Kittinger’s record, and that other individuals have sought to work with Red Bull in an attempt to break his record, Mr. Hogan claims to own certain rights to the project and filed a multimillion dollar lawsuit earlier this year in a Californian court. Red Bull has acted appropriately in its prior dealings with Mr. Hogan, and will demonstrate this as the case progresses. Due to the lawsuit, we have decided to stop the project until this case has been resolved.”
Austrian Skydiver Felix Baumgartner had been scheduled to jump from a balloon at 120,000 feet and attempt a freefall jump that would, for the first time, reach supersonic speeds as well as, Red Bull says, deliver valuable scientific data. If successful, it would break a record set in 1960 by US Air Force captain named Joe Kittinger when he jumped from 31,000 meters (102,800 feet). His jump contributed valuable data that provided ground work for spacesuit technology and knowledge about human physiology for the US space program. There have been several attempts to surpass Kittinger’s record, but none have succeeded, and people have given their lives for the quest.
Kittinger has been supportive of Baumgartner’s attempt and appeared in this video with him.
Hogan says he pitched the idea to Red Bull as a “marriage of daredevil, record-breaking ‘stuntsmanship’ and cutting-edge technology.” After a year of talks, during which Hogan says Red Bull executives encouraged him to reveal the minutest details of the project, the company backed out.
In January this year, Red Bull announced the Red Bull Stratos dive, which Hogan said is precisely the project he pitched except for two things: the name was been changed and he was cut out of it.
Earlier this year, Hogan sought an injunction to halt the project, disgorgement of any profits and punitive damages. He also sought a declaration that Red Bull has certain, specific duties to him.
In his complaint in Los Angeles Superior Court, Hogan claims the daredevil stunt would be worth $375 million to $625 million in advertising to any corporate sponsor.
Hogan claims his proposed dive would be made from 130,000 feet. He also said he had assembled a team that included Per Lindstrand, who holds the hot-air balloon altitude record, Dr. Coy Foster, a former NASA flight surgeon, Dr. Steve Lingard, an expert in the aerodynamics of the human body, filmmaker Slim McDonald, and a Russian company that agreed to develop the spacesuit.
Hogan claims that in meetings, emails and other communications Red Bull received specifications for the gondola to be used, the spacesuit, the timeline for developing and testing the equipment, and a list of potential corporate partners.
But on Oct. 13, 2005, Hogan says the company sent him an email stating that “after a very detailed investigation of your proposal, we finally came to the conclusion that we would not like to continue our joint work on the space Dive project.”
Hogan says Red Bull never acknowledged his idea nor has it offered to compensate him for his contributions or sought permission to use information that he disclosed in confidence.
