October 2015
From NEOs to real action: testing asteroid impact scenarios
...enhanced to ensure that either they are able to withstand the impact effects Although the tracking observations indicated that the fictitious asteroid posed a serious risk of impacting Earth on 3 September 2022, with an estimated likelihood of impact...
March 2016
Gravitational waves provide new window on the universe
... the locations and orientations of the two LIGO observatories, and indicates the light travel time between them. Inset (b) shows how ... mass of the final black hole during the ringdown indicates that the coalescence converted about three times the mass...
July 2016
Our changing world and the mounting risk of a calamitous solar storm
... require the development power sources that could be easily generated by solar arrays. The accompanying chart (below) indicates the magnetic field levels of various applications. Such a magnetic solar shield structure could provide protection against...
September 2016
Small launcher market survey
... small launchers in that band. These trends seem to indicate that interest is for dedicated launch for the direct injection...kilogram. Interviews with key players in the industry seemed to indicate a wariness in the reality of the small launch market....
October 2016
Unlocking the potential of annular ion engines
...electrical efficiencies as compared to the NEXT thruster. As indicated, the near-term curve drives down the Isp cross...), as well as SOA ION. Curve fits of data for both technologies indicate a cross-over in F/P at about 2600 seconds. Also plotted are ...
March 2017
Rosetta – outstanding climax to pioneering mission
... we receive the long-awaited signal from the spacecraft, indicating that it was still there, healthy and ready to perform...to its normal flight mode and looked at the few telemetry indications we had from the long hibernation period. It turned out that...
