The world’s smallest optical space telescopes to launch on Monday.
The world’s smallest optical space telescopes to launch on Monday.
Tag: engineering
A jetpack that takes off like a plane.
A jetpack that takes off like a plane.
With a name right out of Thunderbirds, Skyflash is, if nothing else, ambitious. The wing, which is worn like a backpack, is designed to take off from the ground and, if successful, will be the smallest twin engined plane ever built.
The Antares hot fire test of the rocket’s first stage was successfully completed tonight.
The competition heats up: The Antares hot fire test of the rocket’s first stage was successfully completed tonight.
The 29-second hot fire test took place at 6:00 p.m. (EST) on February 22, 2013 at the Mid-Atlantic Regional Spaceport’s (MARS) Pad 0A, which was designed and built over the last several years to accommodate liquid-fuel space launch vehicles. The primary goals of the test were to ensure that the launch complex’s fueling systems and the Antares stage one test article functioned properly in a fully operational environment, that engine ignition and shut down commands operated as designed, and that the dual AJ26 first stage engines and their control systems performed to specifications in the twin-engine configuration. The test included a full propellant loading sequence, launch countdown and engine ignition operation. The pad’s high-volume water deluge system flowed throughout the entire period of the test to protect the pad from damage and for noise suppression.
The first stage will now be prepped for a full scale test launch of Antares, expected in about six weeks. If that is successful, Orbital Sciences will then follow with a flight of the Cygnus capsule to ISS.
Falcon 9 static fire test is now set for Monday.
The Falcon 9 static fire test is now set for Monday.
I’m not sure if this is a reschedule, or the information I posted from previous stories was incorrect. Either way, this test is their standard preparation for Falcon 9’s next launch.
An update on Boeing’s CST-100 capsule.
The competition heats up: An update on Boeing’s CST-100 capsule.
New data has allowed scientists to lower the chance that the asteroid Apophis will hit the Earth in a future orbit.
New data has allowed scientists to lower the chance that the asteroid Apophis will hit the Earth in a future orbit.
Recent observations from Pan-STARRS PS1 telescope at Haleakala, Hawaii have reduced the current orbital uncertainty by a factor of 5, and radar observations in early 2013 from Goldstone and Arecibo will further improve the knowledge of Apophis’ current position. However, the current knowledge is now precise enough that the uncertainty in predicting the position in 2029 is completely dominated by the so-called Yarkovsky effect, a subtle nongravitational perturbation due to thermal re-radiation of solar energy absorbed by the asteroid. The Yarkovsky effect depends on the asteroid’s size, mass, thermal properties, and critically on the orientation of the asteroid’s spin axis, which is currently unknown. This means that predictions for the 2029 Earth encounter will not improve significantly until these physical and spin characteristics are better determined.
The new report, which does not make use of the 2013 radar measurements, identifies over a dozen keyholes that fall within the range of possible 2029 encounter distances. Notably, the potential impact in 2036 that had previously held the highest probability has been effectively ruled out since its probability has fallen to well below one chance in one million. Indeed only one of the potential impacts has a probability of impact greater than 1-in-a-million; there is a 2-meter wide keyhole that leads to an impact in 2068, with impact odds of about 2.3 in a million.
The second paragraph basically says that the keyholes that might bring Apophis back to Earth are very small, making it unlikely that the asteroid will fly through any one of them in 2029. The first paragraph however notes that it will be impossible to chart the asteroid’s course accurately enough to rule out this possibility until we have more data on the asteroid itself.
There will be hot fire tests on Friday of both the Antares and Falcon 9 rockets.
The competition heats up: There will be hot fire tests on Friday of both the Antares and Falcon 9 rockets.
After a three hour outage NASA has regained communications with ISS.
After a three hour outage NASA has regained communications with ISS.
NASA mission control in Houston has lost all communications with ISS.
NASA mission control in Houston has lost all communications with ISS.
Communications are still possible each orbit for short periods with Moscow.
The hotfire test of Antares’ first stage has been rescheduled for Thursday, February 21.
The hotfire test of Antares’ first stage has been rescheduled for Thursday, February 21.
The abandoned calibration targets used by surveillance satellites of the 1960s.
The abandoned calibration targets used by surveillance satellites of the 1960s.
“There are dozens of aerial photo calibration targets across the USA,” the Center for Land Use Interpretation reports, “curious land-based two-dimensional optical artifacts used for the development of aerial photography and aircraft. They were made mostly in the 1950s and 1960s, though some apparently later than that, and many are still in use, though their history is obscure.”
A group of California scientists have proposed a system to vaporize asteroids that threaten Earth.
A group of California scientists have proposed a system to vaporize asteroids that threaten Earth.
In developing the proposal, Lubin and Hughes calculated the requirements and possibilities for DE-STAR systems of several sizes, ranging from a desktop device to one measuring 10 kilometers, or six miles, in diameter. Larger systems were also considered. The larger the system, the greater its capabilities.
For instance, DE-STAR 2 –– at 100 meters in diameter, about the size of the International Space Station –– “could start nudging comets or asteroids out of their orbits,” Hughes said. But DE-STAR 4 –– at 10 kilometers in diameter, about 100 times the size of the ISS –– could deliver 1.4 megatons of energy per day to its target, said Lubin, obliterating an asteroid 500 meters across in one year.
They also propose an even larger system which could “enable interstellar travel.”