Recent content by collinsmark

Does the app use GPS to track her route? If so, I would expect it would be pretty accurate (i.e., the 0.698 m/step would have been calculated based on the GPS measured length of the route*, and not the other way around). * Edit: and the number of steps, which can be recorded and counted based...

That's an important question worthy of discussion. The answer isn't simple. If I had to give a short answer it's this: the color saturation that I used in this image is higher than what would normally be used in a terrestrial photograph. And the color saturation that I used in my photo is...

I've got more data! :smile: Here's M100 (a.k.a., NGC 4321, "The Blowdryer Galaxy," "The Mirror Galaxy") with about 37 hours of data and a lot more care with post-processing. (It's the same target as before, just with more data and more care.) Not only did I gather more L, R, G, B data, but I...

The Blowdryer Galaxy (a.k.a., M100, NGC 4321, Mirror Galaxy), imaged from my back patio, March-April 2024. The galaxy is about 56 million light-years away and can be found in the constellation Coma Berenices. Figure 1. M100. I understand the "Mirror Galaxy," nickname, due to its symmetry I...

Tell me about it. It's been this way for awhile now. (We might have a clear night next week though. Maybe. But the comet will be too close to the horizon for my setup though.) Regarding 12P/Pons-Brooks (the "Devil's Comet"), Over a month ago I did attempt to plan out (using Stellarium) a good...

There's definitely some truth there. The first half of my life I spent in America's heartland. I've been in both situations more than I can count. While I wouldn't necessarily recommend the second, cracking open a beer and sitting on the front steps looking around the sky for wall clouds is a thing.

Forgive me, but I was sort of pulled into this thread by accident when my post from a different thread got moved here. So when I started commenting it was without the context of the whole first part of this thread. But now I do have a question. I'm led to believe that the bosonic creation and...

Yes, of course. They only measure discrete detection events. The same is true of the pixel elements in the sensor of my digital camera.

Here's a few. Wavefront sensing with prisms for astronomical imaging with adaptive optics "A scenario where a read out noise of 5 electrons is also evaluated and the 3-sided prism WFS is found to have a Strehl ratio 12% higher than that of the pyramid WFS with a photon flux of 5...

Although I was about 10 years old, that was my reaction when I first got glasses.

Not to be nitpicky here, but I think you'll find "photon flux" being spoken of in optical & near-infrared, particularly when discussing the sensor itself. Even in my backyard telescope, which I presently only use to take "pretty pictures" in optical wavelengths, it's essentially counting...

I found it specified in the EdgeHD whitepaper. Here's a link to the paper below (PDF format): https://s3.amazonaws.com/celestron-site-support-files/support_files/edgehd_whitepaper_final.pdf The image circle spec is 42 mm diameter. For reference, a 35 mm full frame format is 24×36 mm, giving it...

Actually, I never really thought about this until now. But I think the key word here is "emission." I don't think anybody was debating the existence of photons. Sure, it's easy enough to measure the reception of a photon (well, easier perhaps), but how do you measure/observe the emission of a...

Here's a link to the source (easier to read that way): https://toggl.com/blog/build-horse-programming

I think I've got the Nikon beat (2nd link). Both it and my new scope are catadioptric (probably both corrected Schmidt Cassegrains). Although I haven't tested my scope to find what its minimum focus distance is. All as I know for certain that it's less than 384,000 km, and probably a lot less...