Starship Asterisk*

I suppose this is a similar technique to get an analemma. Is it ok?

Let's see, over four hours the earth rotates by sixty degrees; therefore, each of the 68 frames that were combined was rotated as needed to compensate for earth's rotation, so that the patterns of stars from different frames overlapped correctly. That leaves a puzzle: Why is the silhouette of a tre...

If I've understood well, today's APOD image should have had these fiducials, and actually it doesn't, so one's not able to discriminate sizes - I mean dimensions - and distance. fid.jpg This image does have fiducial marks, as we'd expect for an image from that time, made on film. And the film is ce...

I must say that this discussion has been the most interesting for me. In fact, I've learned a lot. Fido's history has touched my heart almost to tears. If I've understood well, today's APOD image should have had these fiducials, and actually it doesn't, so one's not able to discriminate sizes - I me...

neufer wrote:

[b][color=#0000FF]Image credit: J-P Metsavainio of Astro Anarchy:[/color] http://astroanarchy.blogspot.fi/[/b]

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It's really a interesting image what you've posted. But, what means this image slipping to right and left?

The meteor running under Triangulum goes toward Constellation Perseus and not in the opposite direction as I would expected. Is this ok? All these annotations on the image are important for me; I'm just learning from all of you, guys. I think the meteors not having the "normal" shape were ...

All of us know Earth has been hit by many "potentially hazardous asteroids". As far as I know, Rusia has had "very close encounters" at least two times: one at the very beginning of XX century and the last one Russians had this year and caused serious damages in buildings and per...