Stellar-mass black holes are the result of a gravitational collapse of a massive star at the end of its life. The core of such star…
Tracing the origins of the discovery and the development of observations of NGC 1555, also referred to as the Hind’s Variable Nebula in the constellation…
The CMD submitted in the previous fortnight shows members of NGC 4755 – an open cluster in Crux. The stars were selected in the SIMBAD…
As an amateur astronomer, I was to an unnecessary degree opposed to the concept of astrology, especially if questioned about its scientific impact. The more…
Jupiter and its satellite, Io, with WinJUPOS stereographic projections of North and South poles.
Sunspot Group AR 1236 in Calcium K Line
M57—The Ring Nebula (NGC 6720)
M 97—The Owl Nebula (NGC 3587)
Abell 81—Planetary Nebula in Cepheus (IC 1454, PK 117+18 1, ARO 376)
Abell 50—Planetary Nebula in Draco (NGC 6742, PK 78+18.1).
