In the discussions of the Milky Way Project there were several collected items that are subclasses of main classifications. Here I present a list of donut bubbles, inverted bubbles, butterflies (bipolar bubbles) and green balls. Additionally there is a list of bubbles that are reflection nebulae (RN) found by matching bubbles of MWP DR1 (Simpson+,… Continue reading Subclasses of bubbles and yellow balls
A runaway star might form a bow shock by heating interstellar material and the mechanism, by which a runaway star is formed, should not prefer any direction. I ignored the case where a bow shock does move towards us or away from us (umbrella bow shock). But two things should decrease the number of bow… Continue reading Where are the bow shocks?
Bild vom Milky Way Project. Dies ist eine “invertierte Blase”. Eine Blase ist in der Astronomie ein Nebel, der seine Form mithilfe massenreicher Sterne bekommt (siehe MWP about page) Eine invertierte Blase ist eine Blase, deren Polycyclischen aromatischen Kohlenwasserstoffe (PAKs oder PAHs) nicht durch die starke UV-Strahlung der Sterne zerstört wurden, wie es etwa bei… Continue reading Invertierte Blasen und Donut Blasen
If you want to create an image from telescope data, you might see data in the FITS format, which you cannot open without the right software. FITS-files end with .fits, .FITS, .fit, .FIT, .fts, .FTS … First you have to download it from a service. For Infrared Images you should use IRSA (like 2MASS, Spitzer,… Continue reading How to create an image from FITS-files
In a previous post I did map close bow shocks. Bow shocks can form either if the star moves against the interstellar dust (runaway star) or if the interstellar dust moves against the star (like in the Orion Nebula). Most of the close bow shocks I did map do not agree with proper motion and… Continue reading Bow-shock-size/driving-star-mass correlation
If a runaway star is massive and fast enough it can form a stellar bowshock. But what if the star moves into our direction or away from us? It has to look like an umbrella, seen from the top or the bottom. This was the thought of EcceruElme, one of the moderators of the Milky… Continue reading Small tiny “umbrella” bow-shocks
Volunteerism in Zooniverse does have the same structure as other volunteerism if it is about classifications. Usual a lot of volunteers do classify a small set of subjects. They drop by and try the project until they are bored. This can be one subject, ten subjects or one hundred subjects. Less common are engaged volunteers… Continue reading MWP classification stats and volunteers behavior