Comet C/2020 F3 NEOWISE

C/2020 F3 NEOWISE in the city lights This comet is somehow unexpected guest. It was discovered by a team using the…


Messier 63 spiral galaxy crop

Messier 63 Sunflower galaxy

Messier 63 Sunflower galaxy is somehow iconic object. Once you saw it, you probably will not forget it. It is a spiral galaxy with no central bar…


Plaiedes - annotated image

Pleiades spectra

During last observing session I pointed telescope with attached spectroscope to well known Pleiades open cluster. It is also called "Seven Sisters"…


Radial velocity cover

Amateur measurements of radial velocity

Since you are here you probably are interested somehow in astronomy. And you probably already are aware of terms like Doppler effect or radial…


LowSpec spectroscope cover

LowSpec amateur spectroscope

I have been looking for different aspects of astronomy since the time I started to consider astronomy as a hobby. Spectroscopy was also one of this…


M1 Crab nebula expansion logo

Messier 1 Crab nebula expansion

Messier 1 nebula, also known as Crab, is a supernova remnant in the constellation of Taurus. It corresponds to a bright supernova recorded by…


What telescope to buy - logo

What telescope to buy? Part I - visual observations

End of the year is coming, nights getting longer at the northern hemisphere, many people start to think about gifts and presents. Winter night…


Astronomy myths - featured

Astronomy amateurs myths - part I

There are quite a few statements that are present among astronomy amateurs, and are not necessarily always true. Let's check if you are aware of…


Double star measurements

Double stars observations

I already made a two entries about observing and measuring double stars (here and here). Over last one year and half I had a few sessions with this…


Thirty months with Samyang 135 f/2

It's been well over two years since I got into my hands Samyang 135 f/2 glass and use it as my primary astrophotography lens. Since that time I…


Distant clusters around M82

M82 Cigar Galaxy is well object known to astronomy amateurs. If you are visual observer, then you most probably have already seen it. If you are…


Processing color Moon images

The Moon is very tempting and graceful imaging target. It is enough to have some longer focal length instrument without any tracking abilities to…