A spacewalk November 1 will attempt to find and repair a coolant leak that could force a power reduction at the station.

Construction workers in space: A spacewalk November 1 will attempt to find and repair a coolant leak that could force a power reduction at the station.

A slight 1.5-pound-per-year leak in the channel 2B cooling system has been present since 2007 and during a shuttle visit last year, two spacewalking astronauts added eight pounds of ammonia to the reservoir to boost it back up to a full 55 pounds. The plan at that time was to top off the system every four years or so to “feed the leak,” replacing the lost ammonia as required.

But over the past few months, engineers saw the leak rate suddenly quadruple, either because something changed at the original leak site or, more likely, because another leak developed somewhere else in the system.

Whether the leakage was caused by space debris or a component failure of some sort is not yet known. But the result is: If the leak continues at its current rate, the coolant will drop below a 40-pound safety limit and the system will shut down by the end of the year or shortly thereafter, taking power channel 2B down with it. While the space station can operate without the full complement of power channels, the loss of channel 2B would force flight controllers to power down equipment, eliminating redundancy and reducing the amount of research the crews could carry out.

On Wednesday Richard Branson told an audience of students in Poland that the first paid tourist flight of SpaceShipTwo is at least 12 to 18 months away.

On Wednesday Richard Branson told an audience of students in Poland that the first paid tourist flight of SpaceShipTwo is at least 12 to 18 months away.

That seems about right. This gives them about a year of powered flight tests, all manned but with no paying customers, in order to make sure the system is save for customers.

Engine problems on a Delta 4 rocket launch two weeks ago could delay the launch of the Atlas 5 rocket scheduled to lift the X-37B on its next mission.

Engine problems on a Delta 4 rocket launch two weeks ago could delay the launch of the Atlas 5 rocket scheduled to lift the X-37B on its next mission.

Don’t ask me why the military would delay an Atlas 5 launch because of problems on a Delta 4. It seems to be left over caution from the 1960s, when no rocket was reliable and they were trying to figure out how to do it. Now, it simply seems silly.

Orbital Sciences has delayed the first demo launch of its Cygnus cargo capsule until March 2013 at the earliest.

Orbital Sciences has delayed the first demo launch of its Cygnus cargo capsule until March 2013 at the earliest.

The schedule for Antares itself has not been delayed. Launchpad tests are still scheduled to begin next week, with the first engine test set for early November, and the first launch of Antares set for December.

They don’t explain the reason for the Cygnus delay. I suspect they simply decided to be realistic. It was always unlikely that the first Cygnus launch would follow only a month after the first Antares launch, especially if there are any kinks in that launch.

Blue Origin has successfully tested its new hydrogen/oxygen rocket engine.

The competition heats up: Blue Origin has successfully tested its new hydrogen/oxygen rocket engine.

This would be the second new American rocket engine since the 1980s, following SpaceX’s Merlin engine. That it uses hydrogen/oxygen is also significant, as these fuels provide the highest ratio of power to weight. (As far as I remember, the shuttle was the only other spacecraft to use hydrogen/oxygen.)

Post corrected. Thanks Paul!

The science team for New Horizons is considering shifting the spacecraft’s Pluto flyby away from the planet to avoid orbital debris.

The science team for New Horizons is considering shifting the spacecraft’s Pluto flyby away from the planet to avoid orbital debris.

“We’ve found more and more moons orbiting near Pluto — the count is now up to five,” Stern said. “And we’ve come to appreciate that those moons, as well as others not yet discovered, act as debris generators populating the Pluto system with shards from collisions between those moons and small Kuiper Belt objects.”

Just two months after the failure of its second stage during launch, Russia’s Proton rocket successfully put a communications satellite into orbit yesterday.

The competition heats up: Just two months after the failure of its second stage during launch, Russia’s Proton rocket successfully put a communications satellite into orbit yesterday.

This quote, from this Space News article, also implies that there is increasing competitive pressure in the launch industry, which I attribute to the success of SpaceX’s Falcon 9:

Perhaps the most striking element of the launch is that Washington- and Luxembourg-based Intelsat agreed to proceed with it so soon after the August failure of the Proton Breeze-M upper stage. It has been common practice following previous Proton failures that a Russian government mission would be the customer on the return to flight. In this case, Intelsat and its insurance underwriters were sufficiently persuaded that Reston, Va.-based ILS and Proton prime contractor Khrunichev Space Center of Moscow had come to grips with the issue to agree to be the customer for the first flight after the failure.

The new ebook edition of Genesis

I am thrilled to announce that the new ebook edition of my first book, Genesis: the Story of Apollo 8, is now officially available for sale for only $5.99 from Mountain Lake Press. The direct link to Mountain Lake Press’s sales page is here and on the right. Within two weeks the book will also be available at all retailers, but if you buy it direct from Mountain Lake Press, I will make a little extra money, which would be very much appreciated.

In creating this ebook edition I made sure that all the graphics from the original but out-of-print hardback were included. Valerie Anders, the wife of astronaut Bill Anders, added her own thoughts in a new foreword. I also added a new introduction discussing how the history of space exploration has evolved since the book’s initial publication in 1998. As I noted,
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The Orbcomm communications satellite put in a wrong orbit in the Falcon 9 launch has fallen to Earth.

The Orbcomm communications satellite that was put in the wrong orbit by the Falcon 9 rocket Sunday has fallen to Earth.

According to the company insurance will cover most of the loss. They also said that “had Orbcomm been the primary payload on this mission, as planned for the upcoming launches, we believe the OG2 prototype would have reached the desired orbit.” This appears to be a strong endorsement of the Falcon 9 rocket from the company, which has a contract with SpaceX to launch 17 more satellites on two Falcon 9 launches, scheduled for 2013 and 2014.

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