Researchers are testing a powerful new rocket engine propelled by charged particles instead of chemical fuel – one day it could shorten Mars trips
Forty years ago Buzz Aldrin became the second man to walk on the moon but suffered a breakdown soon after. He tells Stephen Moss how he has finally managed to fill the space left by space
A hero to millions, Neil Armstrong has consistently shunned the limelight. To mark the 40th anniversary of the first manned Moon landing, author Andrew Smith travelled across America to discover why the man who first set foot upon the Moon remains such an enigma.
Jack W. Crenshaw is an aerospace and embedded systems engineer living in the Tampa Bay area of Florida. He has over 40 years of experience in the development of systems and software for both aerospace and industrial systems, and he did much of the early trajectory analysis work for Project Apollo. Since then, he has developed simulation, analysis, and real-time embedded systems for everything from the Space Shuttle manipulator arms to satellite tracking antennae to medical patient monitors. His specialty is the application of advanced methods of math and physics to practical use in working, real-world systems.
Nach Angaben der US-Weltraumbehörde NASA hat sich der Sonnenwind in den vergangenen zehn Jahren deutlich und kontinuierlich abgeschwächt. "Seit Mitte der 90-er Jahre ist der durchschnittliche Druck des Sonnenwinds um 20 Prozent zurückgegangen", berichtet Dave McComas, der Forschungsleiter für den SWOOPS-Sonnenwindsensor an Bord der Ulysses-Sonde, die seit 1990 die Sonne vermisst. Die Geschwindigkeit des Sonnenwinds hat diesen Angaben zufolge nur um 3 Prozent abgenommen, die Temperatur jedoch um 13 und die Dichte um 20 Prozent. Das Magnetfeld der Sonne habe sich sogar um 30 Prozent abgeschwächt.
{. Sterzenbach, {. Conrady, and {. Fichert. Lehr- und Handbücher zu Tourismus, Verkehr und Freizeit Oldenbourg, München, 4., grundlegend überarb. und erw. Aufl edition, (2009)
{. Grönkvist. Technical report / Department of Computer Science and Engineering, Chalmers University of Technology Chalmers Univ. of Technology, Göteborg, (2005)