I just found another 6-hours of 40-minute subs of M31 taken with the Sky90 array, and I added this to the earlier composite. You can see the result above and it is virtually no different from the previous result. I … Continue reading
This image of the Rosette nebula is a composite using data from the 200mm lenses with ASI 2600MC Pro CMOS camera and Optolong filter, together with Hyperstar 4 data using an ASI 2600MC Pro CMOS camera and a UV/IR cut … Continue reading
Here’s a simple little maths problem for you to look at, if you like that sort of thing. For what value of x does the following equation hold true? x^n + 2.x^n+1 = x^n+3 Where x^3 is x cubed.
I sent a friend a low-res version of M31 and they asked if they could have the hi-res version to print out and put on their wall. Now it gets embarrassing – can’t find the hi-res version anywhere. So I … Continue reading
Kemble’s Cascade alone has R N and S-type stars in the frame. In case the labelling on the image itself doesn’t come out too well, the TOP labelled star is BD Camelopardalis S-type, the MIDDLE star is V Camelopardalis N-type, … Continue reading
I just put this montage together of stellar spectral classes with some real examples.
