ISS as seen from departing space shuttle Endeavour. Credit: NASA TV
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A great opportunity tonight (July 28) to see three spaceships cross the sky at once! Endeavour just undocked from the ISS today, so they will be close to each other, plus there’s another spaceship lurking nearby: a Progress re-supply ship ready to dock with the ISS. How can you find out when and where to look for the three spacecraft? There are a couple of different websites that provide real-time tracking data and information about the ISS sighting opportunities. See below for more info.
The image above is a screenshot from NASA TV of the ISS as Endeavour undocked. Notice the shadow of the shuttle on the ISS solar arrays!
NASA has a Quick and Easy Sightings by City site, where you just search for your country and city which provides local times and the location in the sky where the station will be visible.
The European Space Agency also provides their ISS: Where Is It Now site that also allows you to select your country and city to find the station’s location.
The Heaven’s Above website (which also powers ESA’s site) is also an excellent site to find out when the ISS, as well as all sorts of other satellites and other heavenly sights will be visible. At Heaven’s Above, you can plug in your exact latitude and longitude, so if you live in a remote area, you’ll be able to have exact times and locations to look for satellites instead of relying on information for the nearest city.
Additionally, you can get a notification on Twitter when the space station will be zooming over your skies. Follow Twisst. (Thanks to big ian for the reminder of this new Twitter addition!)
Here’s wishing everyone clear skies and great views!
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As space shuttle Endeavour undocks from the International Space Station today (Tuesday), now is a good time to look back at the very successful STS-127 mission. Here’s some great images which tell the story of the mission. Above, astronaut Tim Kopra is pictured in the forward port side area of Endeavour’s cargo bay during the first of five planned spacewalks performed by the STS-127 crew. Kopra is now part of the ISS crew, and is staying onboard the space station to serve as flight engineer.
Moon rock on board the ISS. Credit: NASA
Of course, during this mission we celebrated the 40th anniversary of the Apollo 11 Moon landing. Fittingly, there was a Moon rock on board the ISS. The 3.6 billion year-old lunar sample was flown to the station aboard Space Shuttle mission STS-119 in April 2009. NASA says the rock, lunar sample 10072 serves as a symbol of the nation’s resolve to continue the exploration of space. It will be returned on shuttle mission STS-128 to be publicly displayed.
Here’s a view of the newly installed “front porch” of the Kibo lab, which is actually the Japanese Experiment Module – Exposed Facility (JEF). This platform will hold experiments designed to work outside the protective confines of the station, exposing them to the space environment. The JEF was installed by the astronauts during this mission. Dave Wolf during an EVA. Credit: NASA
During the second STS-127 spacewalk, astronaut Dave Wolf worked outside bringing the Linear Drive Unit (LDU) and two other parts to the station’s External Stowage Platform 3 for long-term storage. Wolf is near the end of Canadarm2, which is anchored on the ISS. Arms in space. Credit: NASA
Speaking of the robotic arms, here’s a view of both the space station and space shuttle robotic arms as seen from inside the Kibo laboratory. A portion of the Japanese Experiment Module – Exposed Facility is also visible. The blackness of space and Earth’s horizon provide the backdrop for the scene. Tom Marshburn during an EVA. Credit: NASA
Astronaut Tom Marshburn makes his second spacewalk on July 24, along with Christopher Cassidy, out of frame. Eleven other astronauts and cosmonauts remained inside the International Space Station and the shuttle while the two astronauts worked outside. Astronauts share a lunch on the ISS. Credit: NASA
In total, there were 13 astronauts on board the ISS, a record for the amount of astronauts in one vehicle. Pictured, clockwise from bottom right, are astronauts Christopher Cassidy and Mike Barratt, with Russian Federal Space Agency cosmonaut Roman Romanenko, an unidentified crew member, Japanese Aerospace Exploration Agency astronaut Koichi Wakata (floating above), Canadian Space Agency astronauts Robert Thirsk and Julie Payette, European Space Agency astronaut Frank De Winne, and astronaut Christopher Cassidy. Either out of frame or not clearly seen are astronauts Mark Polansky, Doug Hurley, Dave Wolf, Tim Kopra and Tom Marshburn, plus Russian Federal Space Agency cosmonaut Gennady Padalka. ISS as seen from departing space shuttle Endeavour. Credit: NASA TV
This screen shot shows the ISS as seen as Endeavour departed from the station on July 28. The views of both the ISS and shuttle were stunning. We’ll post the high-resolution versions when they become available. Notice the shadow of the space shuttle on the space station solar arrays! Amazing! Endeavour's launch. Credit: NASA
And now we’re back to the beginning of the mission. Liftoff for the STS-was at 6:03 p.m. (EDT) on July 15, 2009 from launch pad 39A at NASA’s Kennedy Space Center. The storm clouds stayed far enough away so that Endeavour and her STS-127 crew finally on its sixth attempt. Watch a replay of the launch here.
The ISS and Endeavour transitting the sun. Credit: Thierry Legault
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Wow! Take a look at this image captured by award-winning French astrophotographer Thierry Legault. The visible detail of the shuttle and parts of the International Space Stations is absolutely amazing! If you remember, Legault also took images of space shuttle Atlantis and the Hubble Space Telescope transiting the sun back in May during the HST servicing mission.
Legault is an engineer who lives near Paris. He started his digital imaging in 1994, and currently uses a SBIG STL-11000M CCD camera with AO-L system that is equipped with large and narrow band filters. He also uses a reflex Canon 5D, webcams from Philips as well as Astrovid video cameras.
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Space station astronauts repaired a broken toilet in the U.S Destiny laboratory today, avoiding a potentially messy situation. With the shuttle-space station complex currently home to a record combined crew of 13 astronauts and cosmonauts, fixing the toilet was of utmost importance. ISS crew members Gennady Padalka and Frank De Winne were told to don safety goggles and protective gear before opening the toilet’s access panels. They replaced a half-dozen components during work Sunday and Monday repairing the defective toilet with spare parts on the orbiting outpost.
While toilet repairs were going on, shuttle astronauts David Wolf and Thomas Marshburn completed the second spacewalk of the STS-127 mission, during a day filled with remembrances and tributes to the Apollo 11 moon landing.
The two astronauts transferred a spare KU-band antenna to long-term storage on the space station, along with a backup coolant system pump module and a spare drive motor for the station’s robot arm transporter. Installation of a television camera on the Japanese Exposed Facility experiment platform was deferred to a later spacewalk. This was the second of five STS-127 spacewalks, the 127th in support of International Space Station assembly and maintenance.
The STS-127 mission spacwalks will complete construction of the Japan Aerospace Exploration Agency’s Kibo laboratory.
The ISS has two toilets for its six-person crew, the one that malfunctioned in Destiny and another in the Russian Zvezda command module. The space shuttle Endeavour also is equipped with a toilet.
After tests to make sure the toilet was operating properly, flight controllers cleared the combined 13-member shuttle-station crew to resume normal use.
“The US Destiny lab toilet has been repaired and checked out. The crew has been given a “go” to use it. All three toilets are working,” NASA said in a post on Twitter.
The storm clouds stayed far enough away so that space shuttle Endeavour and her STS-127 crew finally launched on July 15 on its sixth attempt. The video here shows spectacular views, from the camera mounted on the shuttle’s external tank, showing the launchpad dropping away below, and then the separation of the shuttle’s twin boosters two minutes and five seconds into the flight. Watching the video here, multiple pieces of foam insulation can be seen falling away from the external tank during the early moments of flight. The crew is working today on heat shield inspections to see if any significant damage occurred from any foam strikes on the belly of the orbiter. Continue reading “Watch the STS-127 Launch Video in HD”
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With the fuel leak apparently fixed, space shuttle Endeavour is ‘”go” for launch for the STS-127 mission. But the weather could force another delay. Forecasters predict a 60 percent chance thunderstorms on Saturday evening at Kennedy Space Center, and Endeavour’s launch is scheduled for 7:39:35 p.m. EDT. “Bottom line from the team, everybody’s go for launch, we have no major issues at all,” said Mike Moses, director of shuttle launch integration at the Kennedy Space Center. “We’re in really good shape for launch. We do have some challenges with the weather, but we’ll just work through those.”
Two previous launch attempts on June 13 and 17 were scrubbed when a hydrogen vent line attached to the side of the tank began leaking during fueling. NASA engineers replaced a one-piece Teflon seal with a different and more flexible two-piece seal, and in a fueling test on July 1, no leaks were detected.
The 16-day mission will feature five spacewalks and complete construction of the Japanese Kibo laboratory, adding a platform to the outside of the module that will allow experiments to be exposed to space.
Endeavour’s crew consists of commander Mark Polansky, pilot Douglas Hurley, Canadian flight engineer Julie Payette, David Wolf, Christopher Cassidy, Thomas Marshburn and space station flight engineer Timothy Kopra .
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The 1908 Tunguska event has always been mysterious and intriguing because no one has been able to fully explain the explosion that leveled 830 square miles of Siberian forest. But the latest research has concluded that the Tunguska explosion was almost certainly caused by a comet entering the Earth’s atmosphere. And how researcher Michael Kelly from Cornell University came to that conclusion is quite interesting: He analyzed the space shuttle’s exhaust plume and noctilucent clouds.
“It’s almost like putting together a 100-year-old murder mystery,” said Kelley, a professor of Engineering, who led the research team. “The evidence is pretty strong that the Earth was hit by a comet in 1908.” Previous speculation had ranged from comets to meteors.
Noctilucent clouds are brilliant, night-visible clouds made of ice particles and only form at very high altitudes and in extremely cold temperatures. These clouds appeared a day after the Tunguska explosion and also appear following a shuttle mission.
The researchers contend that the massive amount of water vapor spewed into the atmosphere by the 1908 comet’s icy nucleus was caught up in swirling eddies with tremendous energy by a process called two-dimensional turbulence, which explains why the noctilucent clouds formed a day later many thousands of miles away. Noctilucent clouds over Saimaa. Credit: Wikipedia
Noctilucent clouds are the Earth’s highest clouds, forming naturally in the mesosphere at about 55 miles over the polar regions during the summer months when the mesosphere is around minus 180 degrees Fahrenheit (minus 117 degrees Celsius).
The space shuttle exhaust plume, the researchers say, resembled the comet’s action. A single space shuttle flight injects 300 metric tons of water vapor into the Earth’s thermosphere, and the water particles have been found to travel to the Arctic and Antarctic regions, where they form the clouds after settling into the mesosphere.
Kelley and collaborators saw the noctilucent cloud phenomenon days after the space shuttle Endeavour (STS-118) launched on Aug. 8, 2007. Similar cloud formations had been observed following launches in 1997 and 2003.
Artist impression of the Tunguska event.
Following the Tunguska Event, the night skies shone brightly for several days across Europe, particularly Great Britain — more than 3,000 miles away. Kelley said he became intrigued by the historical eyewitness accounts of the aftermath, and concluded that the bright skies must have been the result of noctilucent clouds. The comet would have started to break up at about the same altitude as the release of the exhaust plume from the space shuttle following launch. In both cases, water vapor was injected into the atmosphere.
The scientists have attempted to answer how this water vapor traveled so far without scattering and diffusing, as conventional physics would predict.
“There is a mean transport of this material for tens of thousands of kilometers in a very short time, and there is no model that predicts that,” Kelley said. “It’s totally new and unexpected physics.”
This “new” physics, the researchers contend, is tied up in counter-rotating eddies with extreme energy. Once the water vapor got caught up in these eddies, the water traveled very quickly — close to 300 feet per second.
Scientists have long tried to study the wind structure in these upper regions of the atmosphere, which is difficult to do by such traditional means as sounding rockets, balloon launches and satellites, explained Charlie Seyler, Cornell professor of electrical engineering and paper co-author.
“Our observations show that current understanding of the mesosphere-lower thermosphere region is quite poor,” Seyler said. The thermosphere is the layer of the atmosphere above the mesosphere.
Shuttle workers attempt to figure out the cause of the hydrogen leak. Credit: NASA
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A couple of news stories showed up yesterday suggesting the hydrogen leak that has kept space shuttle Endeavour grounded could possibly be the work of sabotage. Not by foreign operatives, but by the people who work on the shuttles themselves, in an attempt to extend the shuttle program — and their jobs — for a longer period of time. Understandably, shuttle workers and NASA leaders were outraged at suggestions of sabotage, and several of the articles were later edited to add the following: “This story was updated to reflect additional statements from NASA. Contrary to the previous report, NASA denies it is undertaking any effort to look specifically for sabotage.”
LeRoy Cain, deputy manager of the space shuttle program said no one at NASA suspects any intentional damage to Endeavour at the launch pad, but they do have steps to monitor people who have access to the shuttle — a policy that has always been in place.
“We have talked a great deal about those kinds of potential issues,” he said. “But we’ve got a highly professional workforce here, and to a person, at least when I talk to them, they’re in this business because they love the work that they do.”
No cause has been found for the leaking fuel line that has twice delayed Endeavour’s launch, as well as delaying and an earlier shuttle mission that eventually launched in March. And NASA has no reason to suspect it was intentional.
Engineers said they strongly believe that the problem will turn out to be an explainable flaw — not sabotage.
As of Thursday, NASA has no formal sabotage investigation under way.
NASA was forced to postpone the launch of space shuttle Endeavour on Wednesday for the second time after a problem with a hydrogen gas leak surfaced again while the ship was being fueled for flight.
An identical problem delayed a launch attempt on Saturday. Technicians had replaced seals in a hydrogen vent line in hopes of fixing the leak. The next opportunity to launch Endeavour will be on July 11 because of because of temperature constraints related to the International Space Station’s orbit.
“We’re going to step back and figure out what the problem is and go fix it,” said deputy shuttle program manager LeRoy Cain. “Obviously we have something here we didn’t understand as well as we thought we may have.”
Next up: Thursday June 18’s launch attempt for LRO/LCROSS at 5:12 p.m., 5:22 p.m. or 5:32 p.m. EDT. (9:12. 9:22 or 9:32 GMT)
LRO on the launchpad. Credit: NASA
It’s a crowded dance floor and someone had to step aside. Because of Saturday’s launch delay for STS-127, the shuttle and the upcoming dual mission to the moon — the Lunar Reconnaissance Orbiter (LRO) and Crater Observation and Sensing Satellite (LCROSS) — were both vying to launch from Kennedy Space Center on the same day, which is not a possibility (usually there needs to be at least 48 hours between launches as the Air Force’s Eastern Range that monitors needs that amount of time to reconfigure the systems.) At a press conference today, NASA launch manager at KSC, Chuck Dovale announced LRO/LRCROSS will give up their originally schedule launch date of June 17 so that the shuttle can go. “We are relinquishing the June 17 date to the shuttle,” he said. “However, we will maintain June 18 as the earliest possible date for LRO/LCROSS. We will monitor the shuttle’s progress, and if they were to scrub the launch for any reason before midnight on the 16th, we can still maintain launch on the 18th.” But there’s a lot that has to go right for the optimum and hoped for launch schedules to happen. Continue reading “LRO/LCROSS Gives Up Launch Date for STS-127”
