ABSTRACT Radio astronomical measurements of extended emission require knowledge of the beam shape and response because the measurements need correction for quantities such as beam efficiency and ...

Core4ce has received a $98.7 million contract modification from the Air Force Research Laboratory that expands an existing program focused on research activities involving advanced photonic materials.

StarDome is a Java applet simulating the night sky, initially displaying the view from Waukesha, Wisconsin, but customizable to any location using latitude, longitude, time zone, and daylight saving ...

AT 20 minutes to 6 P.M. on Saturday 10th inst., I witnessed a natural phenomenon which I understand is very unusual. It was a portion of a halo around the zenith. Take the zenith as centre, and with a ...