Ultra-Luminous X-ray Sources: an Overview of Discussion on Their Origins and Nature
The subject of the nature and origins of ultra-luminous X-ray sources (ULXs) remains at the frontier of modern research. Existing […]
Detection of Population III Stars
It is suggested that two distinct Population III classes may have existed: population III.1 and population III.2. The former, consisting […]
Planetary Energy Balance, Kevin–Helmholtz Contraction
I would like to discuss Jupiter’s energy balance, in particular the excess heat radiated by it to space and the […]
Galaxy Photometry
The aims of this project are as following: Reduce multi-band (BVR) CCD data of the M 51, M 63, M […]
Dynamical Mass Measurement of the Coma Cluster (Abell 1656)
Following (Zwicky 1937) we start with the virial theorem that relates the average kinetic energy ⟨K⟩ to the average gravitational potential […]
Difficulties Involved in Observing Star and Planet Formation
It is known that star formation occurs in regions where dense molecular clouds undergo gravitational collapse. While observations of cold […]
What is a Galaxy?
Galaxies are enormous conglomerations of stars and interstellar material. The qualifying morphological properties of these objects, however, remain flexible due […]
Basics of Calculus
This is a one-page note on the basics of calculus. Introduction to the study of change, Differential Calculus, Integral Calculus, Fundamental Theorem of […]
Isochron Dating Method for Dummies (Like Me)
Discussion of radiometric dating method after article by Young (2007). Click on the title image to open this note in […]
DStation 0.5
DStation is a BSD licensed cross-platform software implementing various image deconvolution methods described in J. S. Lim, “Two-dimensional signal and […]