M. Usatov

Astronomy Home Page

Primary Menu
  • Research
  • Notes & EssaysMy essays on various astronomy topics.
  • PostersMy posters and collages designed to concentrate overview information about a particular topic and serve as quick go-to knowledgebases.
  • Galaxies
  • Planetary Nebulae
  • Diffuse Nebulae
  • Star Clusters
  • Solar System
  • Equipment
  • Other
Skip to content
Notes & Essays

Isochron Dating Method for Dummies (Like Me)

October 9, 2015October 21, 2016

Discussion of radiometric dating method after article by Young (2007). Click on the title image to open this note in […]

Research

DStation 0.5

October 8, 2015April 10, 2017

DStation is a BSD licensed cross-platform software implementing various image deconvolution methods described in J. S. Lim, “Two-dimensional signal and […]

Notes & Essays

On the White Dwarf Mass Limit and S. Chandrasekhar

October 21, 2014October 21, 2016

Subrahmanyan Chandrasekhar (1910–1995) was born into a Brahmin family in Lahore, then India. At the age as early as 21, […]

Notes & Essays

Stellar-Mass Black Holes

October 21, 2014October 21, 2016

Stellar-mass black holes are the result of a gravitational collapse of a massive star at the end of its life. […]

Notes & Essays

150 Years Ago Today… Note on the Variable Nebula in Taurus

October 21, 2014October 21, 2016

Tracing the origins of the discovery and the development of observations of NGC 1555, also referred to as the Hind’s […]

Notes & Essays

NGC 4755: Color-Magnitude Diagrams (CMDs) and Zero-Age Main Sequence Luminosities

October 21, 2014October 21, 2016

The CMD submitted in the previous fortnight shows members of NGC 4755 – an open cluster in Crux. The stars […]

Notes & Essays

The Importance of Astrology for the Development and Survival of Astronomy During Medieval Times

October 21, 2014October 21, 2016

As an amateur astronomer, I was to an unnecessary degree opposed to the concept of astrology, especially if questioned about […]

Solar System

Jupiter and Io

October 9, 2014October 9, 2016

Jupiter and its satellite, Io, with WinJUPOS stereographic projections of North and South poles.

Solar System

Sunspot Group AR 1236 in CaK

October 12, 2011October 12, 2016

Sunspot Group AR 1236 in Calcium K Line

Planetary Nebulae

M 57

October 9, 2011October 9, 2016

M57—The Ring Nebula (NGC 6720)

Posts navigation

Previous 1 … 4 5 6 Next
Copyright © All rights reserved. Theme: Minimal Grid by Thememattic