Starship Asterisk*

Dear Donato, great to have you here. Please can you reply to questions posed by others? They whould greatly help to understand how the image was made, than anyone can judge if it is ok or not. 1. Focal lenght of the two images (and eventual crop factor). Can you share 2 originals uncropped? 2. Loca...

I think generally it is debatable when a composite image is composed of pictures taken at different angles, orientations, or even locations, rather than different times and/or settings. The orientation of the sky at such altitude is only possible from the southern hemisphere, thus a sky with such or...

Astronomy errors. ZENITH DIRECTION: Matterhorn clearly show that the zenith direction is up, but the stars say it must be 45°rotated up-right (at the time of the image, Mars-Comet direction is nearly toward zenith). This show that the author probably imaged the star field with equatorial North-up, ...

Sunset in Hydrogen Alpha Wavelength Copyright: Michael Teoh https://www.youtube.com/watch?v=sdUsD32rJic This is my second successful attempt at taking a sunset sequence in the hydrogen alpha wavelength. This time the western sky was perfectly clear. The huge sunspot in AR2835 and a number of bright...

Sunset in Hydrogen Alpha Wavelength Copyright: Michael Teoh https://live.staticflickr.com/65535/51287813474_626dc149de_b.jpg This is my second successful attempt at taking a sunset image in the hydrogen alpha wavelength. This time the western sky was perfectly clear. The huge sunspot in AR2835 and ...

https://live.staticflickr.com/65535/51265850559_016e2ff389_b.jpg First successful attempt at taking a sunset image in the hydrogen alpha wavelength. Despite some thin clouds, the surface features can be seen clearly, including the sunspot in AR2833, a long filament nearby, and a few faint prominenc...