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<title><![CDATA[NASA's Launch Blog Concludes]]></title>
<description><![CDATA[After a spectacular midday liftoff from Cape Canaveral Air Force Station, the Juno spacecraft is heading toward a distant rendezvous with planet Jupiter. NASA's Launch Blog is concluding now, but for updates throughout the mission, stay informed by visiting the mission's website at http://www.nasa.gov/juno. Thanks for being with us today!]]></description>
<pubDate>Fri, 05 Aug 2011 17:39:12 GMT</pubDate>
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<title><![CDATA[NASA Launch Manager: Flight Looking 'Fantastic']]></title>
<description><![CDATA["Flight so far looks fantastic," said NASA Launch Manager Omar Baez, adding that Juno is in the right orbit to start its journey to Jupiter. "We're right on track for that, and everything looked good."]]></description>
<pubDate>Fri, 05 Aug 2011 17:24:45 GMT</pubDate>
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<title><![CDATA[Official Launch Time: 12:25:00.146]]></title>
<description><![CDATA[Today's official launch time was 12:25:00.146 p.m, and the launch team has had every indication of a successful flight for the Atlas V and Centaur and that Juno is now on its way to Jupiter. The spacecraft's power-producing solar arrays will deploy shortly.]]></description>
<pubDate>Fri, 05 Aug 2011 17:21:10 GMT</pubDate>
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<title><![CDATA[Juno Flying Solo]]></title>
<description><![CDATA[Spacecraft separation! Juno's five-year cruise to Jupiter is officially in progress following its release from the Centaur upper stage.]]></description>
<pubDate>Fri, 05 Aug 2011 17:18:27 GMT</pubDate>
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<title><![CDATA[Spacecraft Separation Coming Up]]></title>
<description><![CDATA[Standing by for release of the Juno spacecraft in about three minutes. A clampband will release and push-off springs will propel Juno away from the Centaur at the moment of separation.]]></description>
<pubDate>Fri, 05 Aug 2011 17:15:51 GMT</pubDate>
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<title><![CDATA[Centaur MECO 2]]></title>
<description><![CDATA[The Centaur upper stage's RL-10 engine shut down as expected following a good second burn.]]></description>
<pubDate>Fri, 05 Aug 2011 17:15:07 GMT</pubDate>
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<title><![CDATA[Five Minutes Left in Burn]]></title>
<description><![CDATA[There are five minutes left in the Centaur's second engine burn.]]></description>
<pubDate>Fri, 05 Aug 2011 17:10:37 GMT</pubDate>
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<title><![CDATA[Centaur Engine Starts Final Burn]]></title>
<description><![CDATA[The Centaur engine has restarted for its second burn, a roughly nine-minute-long final push before the Juno spacecraft positioned for its release. This burn will place Juno on the proper departure trajectory.]]></description>
<pubDate>Fri, 05 Aug 2011 17:06:12 GMT</pubDate>
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<title><![CDATA[Centaur, Juno Healthy in Coast Phase]]></title>
<description><![CDATA[The Juno spacecraft is more than half an hour into its flight. With about seven minutes remaining in the coast phase, the Centaur is moving into position for engine restart.]]></description>
<pubDate>Fri, 05 Aug 2011 16:59:33 GMT</pubDate>
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<title><![CDATA[Coast Phase Begins]]></title>
<description><![CDATA[With the first main engine cutoff, vehicle and spacecraft entered a 31-minute coast phase. The blog will take a short break at this time, but if there are any new developments during the coast phase, we'll let you know.]]></description>
<pubDate>Fri, 05 Aug 2011 16:39:35 GMT</pubDate>
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<title><![CDATA[Centaur MECO 1]]></title>
<description><![CDATA[The first Centaur main engine cutoff, or MECO 1, occurred on time as the vehicle reached its planned parking orbit.]]></description>
<pubDate>Fri, 05 Aug 2011 16:36:12 GMT</pubDate>
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<title><![CDATA[Centaur Main Engine Burn Going Well]]></title>
<description><![CDATA[The Centaur upper stage's RL-10 continues to operate very well as the vehicle passes 1,081 miles downrange.]]></description>
<pubDate>Fri, 05 Aug 2011 16:33:01 GMT</pubDate>
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<title><![CDATA[Booster Engine Cutoff; Centaur Engine Burning]]></title>
<description><![CDATA[Three critical events have taken place successfully. The booster engine cut off as expected, the Atlas separated from the Centaur upper stage and the Centaur's RL-10 engine ignited. This burn will last about six minutes. Now nearly five minutes into the flight, these important milestones continue to go smoothly.]]></description>
<pubDate>Fri, 05 Aug 2011 16:30:04 GMT</pubDate>
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<title><![CDATA[Payload Fairing Jettisoned]]></title>
<description><![CDATA[The Juno spacecraft is getting its first exposure to the space environment now that the payload fairing has fallen away. The vehicle is experiencing five times Earth's gravity as it continues its journey.]]></description>
<pubDate>Fri, 05 Aug 2011 16:28:47 GMT</pubDate>
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<title><![CDATA[Boosters Jettisoned]]></title>
<description><![CDATA[The rocket's five solid rocket boosters burned out and jettisoned as expected. Solids No. 1 and No. 2 were let go first, followed one-and-a-half seconds later by No. 3, No. 4 and No. 5.]]></description>
<pubDate>Fri, 05 Aug 2011 16:26:58 GMT</pubDate>
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<title><![CDATA[Liftoff! Juno Sets Sail for Jupiter]]></title>
<description><![CDATA[Ignition and liftoff! The Juno spacecraft is on its way, beginning a six-year, 2.1-billion-mile adventure to study our largest planetary neighbor. The Atlas booster's RD-180 engine and five solid rocket boosters are providing a combined 2.5 million pounds of thrust as the rocket pushes up and away from Space Launch Complex 41, guided by the Centaur avionics system.<br/><br/>The vehicle will reach max Q -- the area of peak aerodynamic pressure -- about 46 seconds into flight.]]></description>
<pubDate>Fri, 05 Aug 2011 16:25:09 GMT</pubDate>
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<title><![CDATA[T-2 Minutes and Counting]]></title>
<description><![CDATA[Standby for launch in two minutes. Both the Atlas booster and Centaur upper stage are on internal power.]]></description>
<pubDate>Fri, 05 Aug 2011 16:23:05 GMT</pubDate>
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<title><![CDATA[T-3 Minutes and Counting]]></title>
<description><![CDATA[The flight termination system is running on internal power as the Atlas propellant tanks come up to flight pressure.]]></description>
<pubDate>Fri, 05 Aug 2011 16:22:13 GMT</pubDate>
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<title><![CDATA[T-4 Minutes and Counting]]></title>
<description><![CDATA[Countdown clocks are ticking once more! Just four minutes until liftoff of the Atlas V rocket and NASA's Juno spacecraft.]]></description>
<pubDate>Fri, 05 Aug 2011 16:21:04 GMT</pubDate>
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<title><![CDATA[Juno on Internal Power]]></title>
<description><![CDATA[The Juno spacecraft is operating on its own batteries now. A set of three solar arrays will power it once it gets into space.]]></description>
<pubDate>Fri, 05 Aug 2011 16:17:50 GMT</pubDate>
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<title><![CDATA[Juno, Atlas V Go for Launch]]></title>
<description><![CDATA[NASA Launch Director Omar Baez received a &quot;Go&quot; from all on his team to proceed with the launch countdown. Launch time is 12:25 p.m. EDT.]]></description>
<pubDate>Fri, 05 Aug 2011 16:16:44 GMT</pubDate>
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<title><![CDATA[New Launch Time: 12:25 p.m.]]></title>
<description><![CDATA[Our new launch time is 12:25 p.m. And according to the Eastern Range, the launch danger area now is clear of stray boats.]]></description>
<pubDate>Fri, 05 Aug 2011 16:10:06 GMT</pubDate>
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<title><![CDATA[Still T-4 Minutes and Holding]]></title>
<description><![CDATA[T-4 minutes and holding. Another five minutes have been added to this hold, allowing engineers additional time to discuss the anomaly the team faced earlier.]]></description>
<pubDate>Fri, 05 Aug 2011 16:06:35 GMT</pubDate>
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<title><![CDATA[New Launch Time: 12:13 p.m. EDT]]></title>
<description><![CDATA[Our new launch time is 12:13 p.m. assuming the Eastern Range is clear to launch by that time. We should hear a poll to proceed with the countdown by NASA Launch Manager Omar Baez shortly.]]></description>
<pubDate>Fri, 05 Aug 2011 15:59:35 GMT</pubDate>
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<title><![CDATA[Technical Issues Resolved]]></title>
<description><![CDATA[Technical issues relating to the Centaur helium system have been resolved, and at this point launch managers are waiting for an update from the Eastern Range regarding the boat in the launch danger area. When the range is "go," a new launch time will be provided. Today's window extends until 12:43 p.m.]]></description>
<pubDate>Fri, 05 Aug 2011 15:56:12 GMT</pubDate>
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<title><![CDATA[Testing Indicates Vehicle is Healthy]]></title>
<description><![CDATA[Testing indicates the Centaur helium system issue is due to ground support equipment, rather than the vehicle itself. So the team is working to figure out how to maintain the required helium flow and cycling until liftoff. Also, the Eastern Range reports a boat has strayed into the launch danger area offshore, and helicopters are on their way to the area to encourage the boater to move.<br/><br/>"We're cautiously hopeful we'll be launching within the window," said NASA Launch Commentator George Diller.]]></description>
<pubDate>Fri, 05 Aug 2011 15:50:08 GMT</pubDate>
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<title><![CDATA[Team Starts Test Procedure]]></title>
<description><![CDATA[The test team has chosen to run a test on the Centaur helium system that will take about five minutes to complete. Then they'll need a bit more time to discuss their findings. Today's launch window is open until 12:43 p.m.]]></description>
<pubDate>Fri, 05 Aug 2011 15:42:12 GMT</pubDate>
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<title><![CDATA[Centaur Helium System Evaluation in Progress]]></title>
<description><![CDATA[The launch team is evaluating an issue with the charge cycles of the Centaur helium system, comparing the data seen today with what was seen previously in a fueled countdown dress rehearsal. Troubleshooting also includes a leak check. The T-4 minute hold will be extended in five-minute increments as the team works to resolve the issue, and the Juno spacecraft remains on external power for now.]]></description>
<pubDate>Fri, 05 Aug 2011 15:37:12 GMT</pubDate>
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<title><![CDATA[Launch Team Working on Atlas Issues]]></title>
<description><![CDATA[The launch team is working to resolve some minor issues with the Atlas rocket, and for now, the decision's been made to hold off transitioning the Juno spacecraft to internal power. That means we will not be able to launch at the opening of today's window at 11:34 a.m., but there's still plenty of time. For now, the T-4 minute hold has been extended an additional five minutes.]]></description>
<pubDate>Fri, 05 Aug 2011 15:28:51 GMT</pubDate>
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<title><![CDATA[T-4 Minutes and Holding]]></title>
<description><![CDATA[Countdown clocks across Cape Canaveral Air Force Station are holding at T-4 minutes. During this 10-minute built-in hold, launch managers and team members will switch to one primary countdown channel and maintain operational silence in control rooms. We're still "go" for launch at 11:34 a.m.]]></description>
<pubDate>Fri, 05 Aug 2011 15:20:08 GMT</pubDate>
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<title><![CDATA[Nine Instruments to Study Jupiter Like Never Before]]></title>
<description><![CDATA[There are nine instruments in Juno's payload. The Jupiter Energetic Particle Detector Instrument (JEDI), Jovian Auroral Distributions Experiment (JADE), and Waves instrument will examine the way the atmosphere interacts with Jupiter's powerful magnetic field, including the spectacular auroras. Magnetometers and the Gravity Science experiment will map the gravitational and magnetic fields to learn more about the massive planet's internal structure. The Microwave Radiometer will peer deep below the swirling cloud tops, while the Ultraviolet Imaging Spectrograph and Jovian Infrared Auroral Mapper (JIRAM) photograph the auroras using ultraviolet and infrared cameras.<br/><br/>Additionally, JunoCam will take wide-angle, color photos of the cloud tops for use in public outreach and education.]]></description>
<pubDate>Fri, 05 Aug 2011 15:02:08 GMT</pubDate>
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<title><![CDATA[A Long Way from Home]]></title>
<description><![CDATA[Light that leaves Earth today will take only about 40 minutes to travel the 445 million miles to Jupiter. For Juno, though, it's a trip that will take five years. The spacecraft is expected to slip into an elliptical orbit around Jupiter on July 4, 2016, and circle the planet 33 times during the course of about one year.]]></description>
<pubDate>Fri, 05 Aug 2011 14:58:09 GMT</pubDate>
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<title><![CDATA[What's in a Name?]]></title>
<description><![CDATA[In Roman mythology, Juno was the goddess who could see through clouds and revealed Jupiter's true nature.]]></description>
<pubDate>Fri, 05 Aug 2011 14:48:07 GMT</pubDate>
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<title><![CDATA[Tanking Operations Wrapping Up]]></title>
<description><![CDATA[Now that the Atlas booster's liquid oxygen level has passed 97.5 percent, the tank will be topped off. At the same time, Centaur liquid oxygen and liquid hydrogen are topping to flight level.]]></description>
<pubDate>Fri, 05 Aug 2011 14:46:22 GMT</pubDate>
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<title><![CDATA[Flight Termination System Undergoes Final Test]]></title>
<description><![CDATA[The Eastern Range is conducting one last check of the communications between the Atlas V rocket and range antennas. If the rocket were to stray off course, this communication loop would allow the range to destroy the vehicle if necessary.]]></description>
<pubDate>Fri, 05 Aug 2011 14:44:35 GMT</pubDate>
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<title><![CDATA[Centaur Liquid Hydrogen Status]]></title>
<description><![CDATA[Fueling of the Centaur's liquid hydrogen tank just passed the 80 percent mark. Coming up, the liquid oxygen tank in the Atlas booster will be topped off and the Eastern Range will check out the flight termination system.]]></description>
<pubDate>Fri, 05 Aug 2011 14:39:19 GMT</pubDate>
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<title><![CDATA[One Hour from Liftoff]]></title>
<description><![CDATA[We're now one hour away from the scheduled liftoff of the Atlas V rocket carrying NASA's Juno spacecraft. Countdown operations are going very well this morning and weather remains "go."]]></description>
<pubDate>Fri, 05 Aug 2011 14:34:04 GMT</pubDate>
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<title><![CDATA[Countdown Status]]></title>
<description><![CDATA[Flight control system final preparations are in progress and fueling of the Centaur upper stage just passed 30 percent. Atlas liquid oxygen is at 70 percent.]]></description>
<pubDate>Fri, 05 Aug 2011 14:32:08 GMT</pubDate>
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<title><![CDATA[Centaur Fueling Begins]]></title>
<description><![CDATA[Half the Atlas booster's liquid oxygen is already onboard as tanking continues. Centaur liquid hydrogen tanking is beginning.]]></description>
<pubDate>Fri, 05 Aug 2011 14:25:03 GMT</pubDate>
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<title><![CDATA[Tanking Progress Update]]></title>
<description><![CDATA[Today's launch countdown is proceeding without issue as the tanking milestones pass. Atlas liquid oxygen is past 40 percent and preparations are beginning for Centaur liquid hydrogen loading.]]></description>
<pubDate>Fri, 05 Aug 2011 14:20:28 GMT</pubDate>
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<title><![CDATA[Centaur Liquid Oxygen Status]]></title>
<description><![CDATA[The Centaur liquid oxygen level just passed 50 percent.]]></description>
<pubDate>Fri, 05 Aug 2011 13:53:05 GMT</pubDate>
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<title><![CDATA[Juno Launch Countdown Status]]></title>
<description><![CDATA[Tanking operations continue as the Atlas V booster and Centaur upper stage are readied for launch. The countdown is going well and weather still looks good for liftoff at 11:34 a.m.]]></description>
<pubDate>Fri, 05 Aug 2011 13:44:29 GMT</pubDate>
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<title><![CDATA[Solar-Powered Spacecraft]]></title>
<description><![CDATA[The hexagon-shaped body of the Juno spacecraft measures 11.5 feet high and 11.5 feet wide -- compact enough to fit within the confines of the payload fairing. But when its three power-producing solar panels are extended, its diameter will stretch to 66 feet. By the time Juno reaches Jupiter, the panels will produce about 400 watts of power -- less than it takes to run a hair dryer, but enough to keep the spacecraft warm and operate its payload.<br/><br/><br/>At launch time, Juno will weigh 7,992 pounds, but more than half is propellant weight. The spacecraft alone weighs in at 3,513 pounds.]]></description>
<pubDate>Fri, 05 Aug 2011 13:39:47 GMT</pubDate>
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<title><![CDATA[Target: Jupiter]]></title>
<description><![CDATA[Humans have studied stormy Jupiter for hundreds of years -- but the Juno spacecraft will be the first to look past the gas giant's churning cloud layers at what lies beneath.<br/><br/>The astronomer Galileo Galilei first discovered the planet's four largest moons: Io, Europa, Ganymede and Callisto. But that was only the beginning. Today, Jupiter has 64 confirmed moons. Composed mainly of hydrogen and helium, Jupiter could have been a star -- if it had been about 80 times more massive.<br/><br/>With the planet's collection of orbiting bodies and its own similarity to our sun, the Jovian system mimics a solar system, making it a tempting target for further study. Scientists hope to learn more about our own solar system by better understanding Jupiter's formation and evolution.]]></description>
<pubDate>Fri, 05 Aug 2011 13:29:27 GMT</pubDate>
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<title><![CDATA[Juno's Ride: The Atlas V]]></title>
<description><![CDATA[Built by United Launch Alliance, the 197-foot-tall Atlas V-551 launch vehicle begins with the 12.5-foot-wide, copper-colored Atlas booster stage and five accompanying solid rocket boosters. Next is the 10-foot-wide Centaur upper stage, then the spacecraft; both are enveloped by a two-piece composite payload fairing that will offer protection to the spacecraft during the first three minutes, 25 seconds of flight. <br/><br/>Both the Atlas V booster stage and Centaur upper stage arrived at Cape Canaveral Air Force Station back in May. The booster was raised to vertical June 13, clearing the way for the boosters to be attached. The Centaur upper stage reached the launch complex June 24, and finally, the payload fairing with the Juno spacecraft arrived July 27.]]></description>
<pubDate>Fri, 05 Aug 2011 13:25:43 GMT</pubDate>
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<title><![CDATA[T-2 Hours and Counting]]></title>
<description><![CDATA[The countdown has resumed and tanking operations are about to begin. The booster stage uses 48,860 gallons of liquid oxygen and 25,540 gallons of RP-1, a refined kerosene already loaded prior to today's coverage. The Centaur's main engine is powered by 4,150 gallons of liquid oxygen and 12,680 gallons of liquid hydrogen.<br/>Fully fueled, the rocket's mass will exceed 1.2 million pounds.]]></description>
<pubDate>Fri, 05 Aug 2011 13:24:04 GMT</pubDate>
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<title><![CDATA[Ready for Tanking]]></title>
<description><![CDATA["The NASA team is ready to proceed with cryo tanking," NASA Launch Manager Omar Baez announced after quickly polling his team. Starting in the next few minutes, all tanks and transfer lines will start chilldown procedures, allowing the hardware to adjust to cooler temperatures before the cold propellants start flowing.<br/>Stand by for release of the T-120 minute hold, expected at 9:24 a.m.]]></description>
<pubDate>Fri, 05 Aug 2011 13:19:47 GMT</pubDate>
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<title><![CDATA[Launch Team Monitoring Countdown from Atlas Spaceflight Operations Center]]></title>
<description><![CDATA[Today's countdown is conducted primarily from the Atlas Spaceflight Operations Center, or ASOC, a few miles south of Space Launch Complex 41. NASA's Launch Blog is listening in via communication channels in historic Hangar AE, where several launch support teams are based.]]></description>
<pubDate>Fri, 05 Aug 2011 13:09:38 GMT</pubDate>
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<title><![CDATA[Jupiter-Bound Spacecraft Awaits Liftoff Today]]></title>
<description><![CDATA[Good morning from Cape Canaveral Air Force Station on Florida's Space Coast, where NASA's Juno spacecraft is set to begin a voyage to the most massive planet in our solar system: enigmatic Jupiter. The new interplanetary explorer will ride into space aboard an Atlas V rocket launching from Space Launch Complex 41. Liftoff is scheduled for 11:34 a.m. EDT. <br/><br/>There's a 70 percent chance of weather cooperating for launch today, according to Launch Weather Officer Clay Flinn of the U.S. Air Force 45th Weather Squadron. At the moment, it's clear and sunny at the seaside launch complex, with temperatures in the mid 80s and a light breeze. Flinn briefed NASA Launch Manager Omar Baez about 25 minutes ago and cited the possibility of cumulus clouds developing along the seabreeze later in the morning as temperatures rise.<br/><br/>Countdown clocks are paused at the T-120 minute mark for a routine built-in hold. The count should resume at 9:24 a.m. as the team gets ready for tanking, in which several thousand gallons of extremely cold, or cryogenic, propellants are loaded into the launch vehicle. We'll explain those operations in further detail coming up. Stay with us for updates throughout the countdown.]]></description>
<pubDate>Fri, 05 Aug 2011 13:00:26 GMT</pubDate>
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<title><![CDATA[Join Us on Launch Day]]></title>
<description><![CDATA[Turn to NASA's Launch Blog at 9 a.m. on Friday, August 5 to follow the countdown to launch of the Atlas V carrying the Juno spacecraft.]]></description>
<pubDate>Wed, 20 Jul 2011 18:02:21 GMT</pubDate>
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