A tanking test for the last shuttle flight encounters problems
During a tanking test of the space shuttle Atlantis today a valve to the main engines leaked, requiring replacement and raising questions whether the July 8 launch date can be met.
Category: Behind The Black
Second X-51 hypersonic flight crashes prematurely
Second X-51 hypersonic flight crashes prematurely.
After what the US Air Force described as a ‘flawless’ flight to the launch point aboard a Boeing B-52 mothership, the X-51 was successfully boosted to Mach 5.0 by a rocket booster. The Pratt & Whitney Rocketdyne scramjet engine successfully ignited using its initial fuel, ethylene. During the immediate transition to JP-7, the conventional fuel that makes the X-51 unique, an inlet unstart occurred. A subsequent attempt to restart and reorient to optimal conditions was unsuccessful.
SDO – March 30, 2010 Solar Eruption
An evening pause: As it appears these events are likely going to become less and less likely, let’s enjoy them while we can.
Note that the height of this eruption was almost twenty times the diameter of the Earth.
TSA blocks private airport screeners
It’s all about power and control, not safety: The TSA has decided to block any further private companies from providing airport screening.
Ten congressmen and a law professor sue to stop the war in Libya
Ten congressmen (from both parties) and a law professor are suing the Obama administration to stop the war in Libya.
SpaceShipTwo completes two glide test flights within twenty-four hours
SpaceShipTwo completes two glide test flights within twenty-four hours.
An X-ray deep field over six weeks by Chandra finds massive black holes common in early universe
An X-ray deep field image taken over a six week period by Chandra had found that massive black holes are common in early universe.
These results imply that between 30% and 100% of the distant galaxies contain growing supermassive black holes. Extrapolating these results from the relatively small field of view that was observed to the full sky, there are at least 30 million supermassive black holes in the early Universe. This is a factor of 10,000 larger than the estimated number of quasars in the early Universe.
The progenitor of the May supernova in M51 identified
The progenitor star that produced the May supernovae in the Whirlpool Galaxy (also known as M51) has been identified, and it isn’t what scientists predicted.
In a preprint paper published today on the Los Alamos astro-ph website, astronomers describe the star that exploded as a yellow supergiant, not a red supergiant or Wolf-Rayet star, as predicted by the theory explaining this particular type of supernova. Moreover, though theory also favors the star being a member of a binary system, the progenitor of 2011dh appears to be a lone star, not even a member of a cluster.
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The world’s oldest functioning light bulb: 110 years old
The world’s oldest functioning light bulb: 110 years old.
Negotiations over debt limit and budget still appear deadlocked
Though some progress has been made, the negotiations over the debt limit and the budget still appear deadlocked.
Shuttle’s end leaves NASA with a half billion dollar pension bill
The pork goes on: The shuttle’s end has still left NASA with a half billion dollar pension bill.
Hezbollah takes over Lebanon’s government
The end of the Cedar Revolution: The terrorist group Hezbollah took over Lebanon’s government this week.