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Lens flair, but it's a sweet pic all the same especially from a phone.

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Excerpt from the linked content^1 by Eric Berger:

>At just over two minutes to go before SpaceX's Falcon 9 rocket was due to launch a crew of four astronauts to the International Space Station early on Monday, the mission was scrubbed due to an issue with igniter fluid.

>NASA's Crew-6 mission had been due to take off at 1:45 am ET from Launch Complex 39-A in Florida, at Kennedy Space Center.

>During the space agency's webcast, the host first mentioned the issue with the TEA-TEB igniter fluid about five minutes before the anticipated liftoff time. Mission operators were not able to clear the technical issue before the instantaneous launch window opened.

>The crew was safe on board the Crew Dragon spacecraft.

>NASA astronauts Stephen Bowen, the mission commander, and Warren “Woody” Hoburg, its pilot, along with United Arab Emirates astronaut Sultan Alneyadi and Roscosmos cosmonaut Andrey Fedyaev, both mission specialists, will egress the vehicle later on Monday morning after propellant is off-loaded from the rocket.

> 

>Shortly after the scrub, SpaceX tweeted a little bit more information about the cause: "Standing down from tonight's launch of Crew-6 due to a TEA-TEB ground system issue," the company said.

>TEA-TEB is a combination of triethylaluminum (TEA) and triethylborane (TEB). Essentially, these are two different metal elements each linked to three hydrocarbon atoms.

>These molecules are held together by rather tenuous bonds that break easily. When it comes into contact with oxygen, therefore, TEA-TEB spontaneously combusts.

>Given the danger involved in working with the chemical, SpaceX probably made a good decision to stand down Monday morning's launch.

^1 Eric Berger for Condé Nast’s Ars Technica, 27 Feb. 2023 07:15 UTC, https://arstechnica.com/science/2023/02/spacex-scrubs-crew-6-launch-due-to-an-issue-with-its-igniter-fluid/

for a graphic like this, you probably want to use adobe illustrator which uses vector lines instead of pixels. vectoring will allow you to make a large enough sun without it looking all pixelated.

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So the downside to long shutter speeds is that if any motion happens during the duration of the exposure, then you will get blur in your image. This is why photos of people in lowlight often aren't sharp - people moving a little bit during the long exposure makes them have visible blur.

For astrophotography, the problem is that the sky is slowly rotating. This is barely perceptible to us, but it's enough rotation that a 10 second exposure may result in star trails - basically stars will appear like streaks instead of points.

So, as you've correctly identified, we want to maximize our exposure time, but you can't go too long or you'll get blurry images. This can be alleviated by star trackers, but that's an extra piece of equipment. One rule that can help with this is the 500 rule, which states that anything over 500/f seconds, where f is your lens's focal length (full frame equivalent), will cause motion blur. Do note that you'll often need to be well under this number to avoid blur, but it's a nice rule of thumb.

Clear skies!

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We prefer to think we're the top in the relationship

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The south would be "the bottom" I'm just making a stupid joke.

Sorry, could you perhaps reword that in such a way that it made more sense?

Thank-you for sharing the latest update, saves me finding out the hard way... I was off making something for tea. Honestly not so excited to be sitting down and eating now but I must sustain myself until the next launch, haha. Hey if you don't mind, I'll copy and paste your comment in my edit.

Oh, and Happy Cake Day mate. Cheers again for the heads up👍

I'd love to try too, there's just one thing unclear for me. Why 1 second exposure? Wouldn't 10 seconds exposures have allowed him to take 1/10th of the photos to get approximately the same result?

But I guess long exposures are not always a good idea, I tried 30 sec and the result wasn't satisfying (but I might have got the focus wrong there)

Very nice, i think the bottom one you nearly have the sharpening perfect, not too heavy. I also have a heavy hand when sharpening in registax haha

Very good for a asi120mc btw. Small sensor drift captures are hard. Not sure if you use firecapture but check out the audible histogram feature. Helps a lot on a manaul dob to hear a ping and long beep when the planet is on sensor.

Clear skies!

Is your sky really this light polluted or can your phone just not capture it? I feel very grateful for my sky now

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From SpaceX.com:

SpaceX and NASA are targeting no earlier than Thursday, March 2 for Falcon 9’s launch of Dragon’s sixth operational human spaceflight mission (Crew-6) to the International Space Station from Launch Complex 39A (LC-39A) at NASA’s Kennedy Space Center in Florida. The instantaneous launch window is at 12:34 a.m. ET (5:34 UTC), with a backup opportunity available on Friday, March 3 at 12:11 a.m. ET (5:11 UTC).

Care to sum up what you've done to see such improvement over the years? Just barely getting started with a homemade 114mm scope now. Has the major improvement been just in image quality or has the amount of detail you've seen with your eyes increased through better technique as well?

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To quote the article:

>researchers have identified meteorite hotspots known as “meteorite stranding zones”. These are areas where the local geology, the flow of the ice, and climate conditions promote the aggregation of meteorites at the surface of the blue ice.

The flow of ice is something that deserves far more Emphasis here.

Antarctica is basically covered by one giant glacier, which flows from the middle to the rim of the continent. Any meteorite falling onto the ice sooner or later ends up at the edge of the glacier.

It depends which ones you mean. The big ones? Like countries. The small ones? Like cities

So first contrast, most meteorites are dark & snow/ice is white. Second climate, it's cold & dry there so weathering takes a long time. Third disturbance, there are very few things including humans to disturb a meteorites position.

But most importantly is that ice there flows over time down hill & near natural obstructions it pushes up into pressure ridges that ablate over time in the wind. This has the effect of concentrating any meteorites that fell into an area near the obstruction.

So researchers will search areas of sloping topography near an obstruction (rock outcrop) to get the best chance of recovering meteorites that fell anything up to perhaps a couple of hundred thousand years ago.

Very cool. I always wonder how big one of those spots are. Is it like a country or rather a city?