The McMechans Telegram Erdmann on October 17, 1930

Cover 17-5 October 2020

Persian-translation 17-5 October 2020

17 Lecture, 28 October 1999

The refractive index of air is close to unity, but not close enough to spare astronomers from one of their most persistent adversaries, turbulence. Energy from solar and local sources is constantly pumped into the atmosphere between telescope and celestial object, changing the temperature and pressure of the air where it is absorbed, in a manner that leads to a variety of fluid instabilities. T...

ASTRON Newsletter 17 - October 2002

It has been said that there is “no radio telescope in the world that is operating at its original design frequency and design specifications”. That will become very true for the Westerbork Synthesis Radio Telescope (WSRT) after the end-to-end Upgrade will be completed in the Fall of 2002. The Westerbork telescope was the brainchild of Professor Jan Oort, who realized that after the “large” Dwin...

Washington University Record, October 17, 1996