150 Years Ago Today… Note on the Variable Nebula in Taurus
Tracing the origins of the discovery and the development of observations of NGC 1555, also referred to as the Hind’s […]
NGC 4755: Color-Magnitude Diagrams (CMDs) and Zero-Age Main Sequence Luminosities
The CMD submitted in the previous fortnight shows members of NGC 4755 – an open cluster in Crux. The stars […]
The Importance of Astrology for the Development and Survival of Astronomy During Medieval Times
As an amateur astronomer, I was to an unnecessary degree opposed to the concept of astrology, especially if questioned about […]
Jupiter and Io
Jupiter and its satellite, Io, with WinJUPOS stereographic projections of North and South poles.
Abell 61
Abell 61 is an old, evolved planetary nebula, about the size of the M97 – The Owl, although much fainter. […]