Archives

Unfiltered CCD observations acquired using the 6-inch [155mm] robotic telescopes of the NASA/Harvard Smithsonian MicroObservatory e-learning project covering the first 163 days following the discovery of the Type IIb supernova 2011dh in Messier 51 are presented.

The Great Filter Debate took place in the BAA in the 1950s. As the writer was involved in the experiment, members of the Association may find the following account of interest.

Cycles of fading and revival of the South Equatorial Belt (SEB) are the most spectacular large-scale events that occur on Jupiter. The most recent started in 2009, when the SEB suddenly ceased its convective activity and began to fade. Modern amateur images, combined with measurements by the JUPOS team, have revealed several new insights into the process. In this pair of articles, I synthesise all the important results of the 2010 Fade (this paper) and Revival (following paper).

Bipolar magnetic regions (BMRs) are the underlying cause of all photospheric and chromospheric solar activity including active sunspot regions, white light faculae and disturbances in the solar granulation. This paper describes how monochrome imaging with commercially available H-alpha telescopes can reveal intricate detail in BMRs.