The text explains the rare phenomenon, in which the azimuths of moonrise and moonset are more extreme. This situation allows us to see distant landscape features with the lunar disk beyond. Learn more about...
At the beginning of this article, I would like to recall one of the questions, which appears from time to time on the Geography Olympiad. The query sounds like this: “If at 9 pm...
The last piece of the topic about the most interesting celestial events in the period of 2021 – 2040 covers lunar occultations of stars. I haven’t described it before, because in my point of...
This text is somewhat the continuation of the previous one, tailored for the most unique celestial events or group of celestial events, which will occur in the 2021-2030 decade. This time you will read...
Recently we have entered the new decade 2021-2030. This is a good time to take a look at what major astronomical events will occur throughout this time. I don’t mean typical celestial events, as...
I would like to introduce the new tool, whose goal is to extract the ephemeris data from the Astropixels.com service. Before I start to describe the major features of my program I would express...
The summary of my amateur test with a Sigma 150-600mm DG OS Contemporary lens and two teleconverters TC-1401 and TC-2001 includes the astrophotography section. I wanted to check this lens in terms of its...
This article is sort of a continuation of issues related to light scattering in the Earth’s atmosphere as well as haze presence. These subjects are closely associated with each other, so some stuff presented...
Light is omnipresent in the Universe and the environment. This is electromagnetic radiation, that can be detected by the human eye. I have written more about the light and the ways of measurement in this...
The International Space Station (ISS) is a habitable artificial satellite in low Earth orbit. This is the largest human-made body in low Earth orbit. The width of ISS is 108.5 m and its length...
