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Showing content with the highest reputation on 28/01/17 in all areas

  1. 15 points
    Saw Olly's version of this and thought it would be nice to have a go, just been waiting for the data to build up. I do have HA as well as the LRGB here, to be honest I liked this and if it is not broken...... Just short of 17 hours data. Hopefully will be received better than last image which bombed Tried not to push too hard on this and let the data lead the processing so C&C welcome. Thanks, Paddy
  2. 11 points
    Hi all, here are some images of last december taken with the Sony A7S (astrodon inside) and my SkyVision 16" telescope in Altaz mode under a light polluted sky Still learning how to get the best of my setup, but the hardest part for me is the processing with PS and other sofwares. Thanks to the A7S the signal is here but with longer exposure it will be better....next time... Clear Sky
  3. 10 points
    This is measly 1hr30mins of data, ISO 800 at 0deg C no darks bias or flats... yep that is it. It's all I could get given the drive and clouds. I'm not sure about the colours so some advice would be welcome ...What are the natural colours of M42 through a full spec modified DSLR with an IDAS LPS D1 filter? I'd like it to look natural and I'd really like my stars to look small and well balanced, how do I go about making a good star mask because I've been unsuccessful so far. I forgot to mention, I couldn't get any short core or medium length frames due to clouds so had to bodge it a bit.
  4. 9 points
    fogged out firstthing so I'm a bit late today, at 10.30 the fog started to clear replaced with 50/50 cloud with some nice gaps, seeing wasn't bad but the cloud was fast moving. kit ed80, 1.5x barlow, lunt wedge, 1200d in mono and 1:1 crop mode. 80 frames in the full disc and 100 frames in the close ups taken with ed80 and asi120mc. thanks for looking and I wish you clear skys with good seeing. charl. mono. coloured. coloured invert. cu1. cu2.
  5. 9 points
    Jupiter, Gif 2 After 1, logically comes the 2! Here I used a few more frames and accelerated the rotation more as my colleague Daryl from Australia suggested. With that, it seemed to me that the sensation of movement was a little more natural, however, I am quite sure that if you reduce the intervals between the films, it should get better. There were 12 films of 10,000 frames, stacking 3,000. Exactly the same processing in AS! 2, Registax, Photofiltre and Fitswork. The nuance differences from one frame to another are due to seeing variance. PIPP was used to mount the GIF, easy to use and maintains the capture size. The only drawback is that you have to convert the frames to Jpg which always results in a loss of quality. Http://www.astrobin.com/281568/
  6. 9 points
    Jellyfish Ha from the DSW widefield setup. 24x600secs stacked in PI with post in PI and PS CC. Thanks for looking.
  7. 8 points
    The clouds parted like a miracle this morning! Long enough for some decent shots despite the low elevation, and an animation, coming soon. The umbra appears to be splitting too, visible more in the second image. Iain
  8. 7 points
    Only managed 26 frames over 13 minutes in sub-optimal conditions but still a happy man! (Also Newtons Rings have gone. As suspected, the rings were due to the tilt adapter not being aligned with the sensor) Iain
  9. 7 points
    Here's my first attempt at M81 taken from my setup in Spain (APM TMB 152 F8 LZOS, 10Micron GM2000HPS, QSI6120wsg8). 39x300s L, 14x300s R, G and B Comments, critique and suggestions most welcome.
  10. 6 points
    Eratosthenes crater is found in the central nearside, east-northeast of Copernicus crater (latitude 14.5°, longitude 348.7°). Eratosthenes is named for the ancient Greek who first estimated the Earth's circumference around 240 BC. In the 1960's, Eratosthenes crater was identified by Gene Shoemaker and Robert Hackman as a key stratigraphic marker delimiting the longest period (Eratosthenian) of the lunar timescale, thought to range from about 3.2 to 1.1 billion years old! However we have very few absolute age dates (from samples) for this period in the lunar time scale, thus its actual age is not well constrained. Sampling key Eratosthenian units (craters, mare, domes, etc) is a prime goal of future lunar exploration. Like Copernicus, Eratosthenes has a well defined rim, walls, and a central peak. However, it lacks rays, and in fact is crossed by rays from Copernicus crater. Shoemaker and Hackman invoked the geologic law of superposition, which says that younger layers lie on top of older layers, and established Eratosthenes to be the older of the two craters, and thus the Eratosthenian period is the second youngest geologic age on the Moon. LROC/NASA - University the Arizona http://www.astrobin.com/full/281578/0/?nc=user
  11. 6 points
    Here is a version with spike reduced down as much as I can do without comprimising - agree i prefer it now Took the change to deal with a few little bits that i also spotted!
  12. 5 points
    7 x 700s plus 22 x 900s taken over 3 nights. Stacked in DSS, processed in PS. John
  13. 4 points
    Just found this link in a Sky & Telescope e-shot https://www.nasa.gov/image-feature/jpl/pia21056/daphnis-up-close
  14. 4 points
    Perhaps your recreational lifestyle might indicate how you best approach indulging in this preoccupation. I live in a city and besides attending occasionally my local Saturday morning Park run event, or occasionally meeting up with friends in a local pub on the high street, my preference in my free-time is to get out of the city boundary, cycling or going walking and camping for example. Therefore this easily translates into venturing on dark sky trips, which is no different than for example being into course or sea fishing and going to a quality stretch of river or sea loch for an evening session. If the weather turns out to be poor then so be it, at least you'd tried and there can still be tranquillity in being for a time in a remote countryside location. Determined very much by where you live of course, in my own circumstance, the transformation from a fairly poor sky to reach a location with an approx. 21.4 - 21.5 SQM reading in approx. 45 to 50 minutes is the difference between continued fascination with this hobby and gradual disinterest if restricted to only being at home.
  15. 4 points
    This the version with only one stretch in photoshop and nothing else.
  16. 4 points
  17. 4 points
    I appreciate that advice. I've been looking at the Dobs. They're nice! On a positive not, for the first time in my life, I saw Saturn and it's rings this morning around 5:45 am. My world changed when that's happened. It was almost too much to believe when I was seeing it. There aren't any words to describe how surreal that was.
  18. 3 points
    Hello, this is my first ever report. When I am at the eyepiece I often get the feeling like "I must write this down and let others know what I've seen", but when I return back here, most of the emotions are already washed away and the memory of the event does not seem as exciting. Nevertheless, after many nights mostly strolling around the sky with no purpose, tonight I prepared a lousy piece of paper with instructions from coterless'45 article about Orion. Actually, I started yesterday by splitting Rigel and Mintaka. Rigel was especially challenging and for a long time it seemed, that it is beyond my reach. I fiddled with eyepieces and a barlow, but I settled down on 100x magnification with 15mm ES eyepiece, which is my favourite eyepiece with good sharpness, brightness and a nice FOV. Slowly, a very thin light from a companion star appeared. It seemed like a tiny speck of light coming out of a glass fiber, but this glass fiber is as thick as a human hair. Very interesting and the challenge of seeing it was 70% of the fun I had. The more I looked at it, the more obvious it was, in the end I was wondering, how could I have had trouble seeing it, it was obvious. Weird. Do our brains work this way? Or is that the eyes, or the atmosphere cleared up? I have no idea. Unfortunately, now as I think of it, I don't remember anything about Mintaka. I will have to look at it again later. Today, I followed the article, so I started with Betelgeuse. Didn't see anything out of the ordinary, there was something wrong with the atmosphere, because the red giant appeared as if someone was twisting my focus knob back and forth. This happened during most of the evening with Tau Ori, Rho Ori, 52, 59 and 33 Ori - all pretty unremarkable and more frustrating than enjoyable (the scope was cooled properly before observing). Let's skip all the unremarkable moments and focus on what was nice. Sigma Ori - I spent a lot of time on this and I kept returning to it. Looks great in a 32mm eyepiece at about 47x mag. The "V" shape reminds me of a miniature Aries. There was something happening near the middle three stars. 15mm EP and multiple minutes of gaze, averted gaze, blinking and moving the scope (I'm pretty new to all this, so I am learning the techniques) revealed two tiny specks of light appearing and disappearing near the brightest star. After a long time on the eyepiece, I still can't say for sure if I've seen those two stars, or if that was my brain playing tricks on me. I am like 60% sure that I've seen one of the fainter stars and 20% sure that I've seen both. Interesting. This experience was similar to the experience with Rigel yesterday, those specks appeared at first briefly, then I was almost certain I see one of them comfortably, but suddenly it disappeared, so I doubted my previous judgement and so on. I will look at Sigma Ori later when the atmosphere is more calm and from a darker spot. I had also fun looking at NGC 2169. I forgot to look for the shape "37", but it was a very nice cluster nevertheless. Finally, I turned the scope to M42, as I do every evening these days. Today, it was pretty unremarkable. The shaky atmosphere and/or light pollution made it hard to even see the "D" star from trapezium and the nebula looked more like a foggy eyepiece than like a nebula. I switched to 32mm eyepiece, which gave a better overall look of the nebula, but still, I've seen it better. Then I've put the UHC filter on and oh man! What a change! Today was one of my personal best views of M42! The wings seemed to expand forever, I've seen some nebulosity far away in the southern direction from the trapezium, which I've never seen before, the details in the darker areas seemed to pop right at me and when I didn't look at them directly, they were even more pronounced. Remarkable sight. This report is longer than I wanted it to be, but I feel like I can go on about this even longer. Maybe I will read this again in a year or two and look back to the days when I was beginning. Clear skies!
  19. 3 points
    M78 isn't the most spectacular target in a 4" scope, but after 20 to 30 minutes under my blackout blanket, it became interesting enough to draw. The transparency let the night down but still an enjoyable evening. Mike
  20. 3 points
    After some hide-and-seek I did manage to catch the sun, fairly late (tea break), and managed to rattle off 2000 frames in WL and Ca-K. Contrast in WL is not as good as it could be due to me forgetting to bring an IR-block filter, but it is OK. I also use partial inversion in Ca-K and picked up some proms. Faint, but they are there. WL, grey scale: WL, pseudo colour: Ca-K, grey scale: Ca-K, pseudo colour: Ca-K part inverted: Ca-K, part inverted + pseudo colour
  21. 3 points
    James - as you may have seen I bought an Ercole mini on a heavy duty photo tripod for my Tak. The Ercole mini easily handles the DC, so the bigger Ercole will be even more solid. Just balance the scope and as you say, adjust the clutches and then just nudge the scope manually - which is pretty straighforward when it's as light as a Tak FC. But whatever you choose, sounds like you're going to have a fantastic set up
  22. 3 points
    For a short observing session, I took out this morning my grab-and-go set, the trusty vintage Vixen 80/400 FH refractor with the Seben Zoom 24-8 mmf, mounted on a Manfrotto Fluid Head and vintage tripod. At 03.00 h the temperature had dropped to -8° C; the visibility, with a slight haze, was at 5.0 - 5.2 NELM (UMi). I started with the galaxy 2903 in the Lion's head, which was in the same 2,4° field of view with Lambda Leonis, and 2 degrees south . At 50x mag, it's elliptic shape and the orientation N - S could easily be made out. Not quite as easy was the galaxy trio M 95/M96/M105. I started star-hopping from Rho Leonis and worked my way, using SkySafari 5 Pro on my smartphone, towards NE. The feature of SkySafari, to show the true field of view of any scope-eyepiece combination as circle on the display, and to flip the orientation, is very convenient - it allows a change in seconds. At 50x, M105 (9.3 mag) could be seen with averted vision as a round patch, with brighter center, accompanied by the slightly fainter oblong 3371. M 96 and M 95 were almost in the same field of view, the latter not quite easy and mostly with AV. The second Leo Triplet with M 65 (9.2 mag), M 66 (9.0 mag) and 3628 showed the two Messier galaxies with direct vision as elliptical smudges with N - S orientation, and more conspicuous than the members of the first trio. 3628 was, as always, more difficult; but I was able to spot it's 5:1 ellipse with AV for about 30% of the time. Of course, I knew the exact position from many former visits with larger dobs, in which the trio is always a spectacular sight. Again, very convenient for the use with SkySafari proved to be the use of the red light shield "Red Eyes Cling Xtra Dark", which I had bought a few months ago from Sirius Astro Products (www.siriusastroproducts.com; of course, no affiliation with these). It keeps the dark adaption at its best, and clings as a very transparent, deep red soft vinyl film perfectly to the display, yet can easily and repeatedly be removed without residues. Combined with a screen-dim app (I use ScreenDim Full), it is, to me, the best solution for using a display near the scope. No stubborn acrylic sheets any more! Very recommendable! (I got this pointer from a CloudyNights forum last autumn). After 04.15, the sky fogged up more and more, and I finished. Thanks for reading Stephan
  23. 3 points
    10 x 300 sec subs From a clients Canon 6D on my 10" Quattro. Calibrated and processed in Pixinsight.
  24. 3 points
    Who, who, who ate all the pies? You did, you did!!!!!!
  25. 3 points
    Sharp intake of breath ! A WHAT !!
  26. 3 points
    Just come across these Derek hope you like Dennis
  27. 3 points
    Following some great Cone's on the forum - popular at the moment! A fascinating region full of textural intracacies . . . I love the Fox Fur and the Baby Q's optics have performed well with the detail both in this feature and in the dark obscuring dust of the "cone" feature itself. Unfortunatley I lost some height to the frame after an SGP upgrade changed the 'synch' default and I neglected to re-set the function back to 'synch' and my frames lost a small amount of alignment after a meridian flip on my last night of capture; resulted in a larger crop on the bottom edge (doh! ). I'll process the Ha and post up another time. I've taken 600s subs for the RGB frames and I've been pleased with the star saturation to their cores without any processing boost - a lesson learned there. Also has really hepled with the blue reflection nebula. Some images on the web show this as much more extensive than I've shown here (can just discern a really faint trace extending into the Fox Fur at "5pm" bottom right of the nebula) although evident being picked up with the hot bright young blue stars as small halos. Need more data and a really dark sky! I think the image scale also helps as I have taken this at the scope's native FL for better resolution and framing. I'm really pleased with the change in focuser to the 3" Feathertouch. I'd like to find time and post up some images of the tube now - quite a difference and I no longer fret over the CAA rotator with its minor tilt inducing effect. Watch this space . . . Time to switch out scopes soon as another collaboration project is being hatched. Details: Takahashi FSQ85EDX at F5.3 Mount GM1000HPS QSI 683wsg-8 with Astrodon 5nm Ha and RGB filters 15 x 1800s Ha; 12 x 600s RG&B each; total integration 13.5hrs Captured with the brilliant SGP and processed with PI. Thanks for looking! Barry
  28. 3 points
    Hi, I have decided and gone for a Skywatcher Explorer 150 PDS on an EQ5 mount. Ordered it from FLO should be here Monday. Let hope for clear skies to try it out.
  29. 2 points
    An unusual take on the perennial debate, but Randall makes a good point.
  30. 2 points
    My Orion 20x80 binoculars turned up yesterday...i am a happy chappie now. I can see the Andromeda galaxy! The Orion Nebula!! And the pub looks like it's next-door ? clear skies!!
  31. 2 points
    It seems like ages since I've had a clear, darkish sky, so i rapidly set the 100mm Tak up in its observatory and looked at M42. The scope was a little warm straight out of the house, so the initial view wasn't breath taking. I decided to move up to M78 and throw my blackout blanket over my head and eyepiece, and just see what I could see after 20 minutes or so. The view of the nebula improved over time until eventually, I felt it was interesting enough to try and sketch. I'd just started drawing when my mobile went off and stupidly I answered it, blinding myself in the process. It took some time to regain my dark adaption, but the black hood over the head technique really helps to improve matters. Moving the nebula across the field of the XW eyepiece helped me to plot its boundaries, which in a 3.9" scope is not the easiest thing to determine. Anyhow, eventually I completed my sketch! I then moved back to M42, and now with a thoroughly dark adapted eye, the view was stunning! The black nebula was immense and wonderfully complex. The dark nebula gave a real 3D impression to the whole scene, as the bright nebulosity exploded from behind the multiple walls of dark nebulosity. The bright nebula was spectacularly complex and radiated a strong pearlescent green hue. The Trapezium with its textbook perfect star images was the cherry on the cake, as the E and F stars stood perfectly and obviously alongside their brighter companions. Now on to M1, which at 106X was large and displayed some interesting detail. The nebula isn't of uniform brightness across its surface in the 100mm, and the bright Z or N shaped figure was seen within the gas shell. At times however, there was indication of tendrils crisscrossing the face of the nebula, and also the occasional hint of filaments extending out from it. These were too indistinct to be able to pinpoint with certainty but they repeatedly revealed themselves, though fleetingly. Back to Orion and a quick look at Alnitak, or rather, the Flame nebula, and extending away from the Flame, though nor appearing to be in contact with it was a ghostly IC474. Clouds were starting to form and so i quickly aimed the scope at M45 and got a brief view of the nebulosity enshrouding the cluster. All in all it was a wonderful hour and a half from an urban site, that shows that even a small scope can deliver some very pleasing views, especially if dark adaption is attained. Mike
  32. 2 points
    sigma ori is awesome - one of my favourite multi-star systems. I introduced a few more people to it on Thursday evening.
  33. 2 points
    Great combination. I use my 150p on an AZ4 rather than equatorial for visual use, but the eq5 will be fine.
  34. 2 points
    Having renewed my interest in astronomy back in November, I've been thinking about what my ideal set up might be. I've built a dob and bought an eq-mounted frac and EPs for visual. I've got a bunch of low-cost imaging experiments going on and a new laptop to play with. I've been learning things here and there but not focusing on anything in particular - performing a breadth-first search, if you like, while acquiring a variety of items which to proceed. I've got three kids so I'd like to be able to wow them from time to time. I've been involved with the local Cub Pack for the last five years and would like to have something I can readily set up for their enjoyment too. Beyond that, I'd essentially like to reach a point where I can take maximum advantage of the infrequent clear nights, given how little free time I'm going to have over the next decade or two - perhaps not fully robotic, but certainly armchair-capable and adequate enough to do some "science". Trying to do too much at once is never a good thing and so I'm holding off on starting the equatorial platform for the dob or doing much more work on the prime focus newt. So for the ST102/SW150, I've broken it down and here are my first three steps: motorise the EQ3 go-to and tracking live view I've got four low-cost cameras: LN300 (PAL) Runcam Owl Plus (PAL) Debayered PS3 Eye (USB 2.0, in progress) 5MP microscope camera (USB 2.0, awaiting delivery) I have just taken delivery of a decent "core i7" laptop running Windows 7 Pro, now well stuffed with astro software. I may dual boot to Debian or run it in a VM. Of course, I can just insert a camera to either scope and point at stuff - I've not actually done that yet but there haven't been the skies and I already know that I'm aiming towards something more... involved. Having just discovered plate solving and seeing the annotated view on the astronomy.net results pages led me to the idea of having an annotated view displayed continuously on a second monitor, likely using the Owl Plus through a binocular objective. There's also the ability to correct for errors in alignment which would be good to have. The issue of capture from a primary camera and what tool chain(s) I use to display/process is separate. As the first goal I'm working towards is a combination of lunar stacking and live lunar video, I can defer any more thought there for a while. It's really the "second monitor" idea I'm trying to develop. I'm not giving up visual as having a live (dimmed) annotated view I hope would complement that too - as a scope-side aid to help learn the sky, find new things, etc... hence my question about lunar plate solving in another thread. Having NGC/Messier overlays, planets, asteroids, etc... is a must, both for me personally and for what I'd like to have up for onlookers, whether imaging through the primary or alongside visual. There is of course any planetarium software used to control the mount, but I like having options and I think being able to demonstrate to others that it detects where it's pointing and shows you what's there would be fun. Initially, I'm not that bothered about accurate tracking - happy to manually jog every once in a while if it makes for a quicker setup - a Wii Remote might be one of the options to control the mount anyway. Over the last few days, I've got a local installation of astrometry.net running and have solved a few fields. Using "plot-constellations", I got the equatorial grid to render locally but there are no coordinates or objects marked yet. I've tried an image with an NGC dead-center but nothing is shown. I expect I will be able to solve the config easily enough with a bit more searching but wondered in the meantime, if anybody had any suggestions or alternatives that might be worth considering, either in tailoring this approach to work for both personal and outreach, or something a little different to try? I'm just feeling my way and sussing out what might work, trying to cover all the bases in my head (personal, outreach, etc...) and find a direction that satisfies all. I'm interested to hear what folk might think, or experiences from folk who have done similar. Thanks for reading, Matt.
  35. 2 points
    Thats it really - get the tension on the axis as you would like it and then gently push or nudge the OTA to track. Rather like a dobsonian. If the mount is decently well made you can adjust the tension to get it to move smoothly but also to stay just where it's pointed. I showed my FC-100DL on the Giro mount at the Bristol AS meeting last night and I'm not sure anyone there had seen such a simple setup before. Most of the observers there seem to use SCT's on GOTO mounts.
  36. 2 points
    Looks good to me! If you look carefully just a difference in processing styles here I suspect. Your stars are probably the same colour as mine. You halo is more blue. I just try to not let the halo's on my version be too different from the central star. Just me personal preference when processing. Maybe I should look at making more blue then bleeding in the colour to the start which i prefer. Paddy
  37. 2 points
  38. 2 points
    While waiting for the sky to clear here in Sweden and galaxy season to start I have been fiddling around with data from last season. The first one is M51 data from Ole Alexander Ødegård (aka Xplode) that I added to some wider star field data that I had. I like the feeling of space around the galaxy while there is some rather nice detail that allows a zoom in. Altogether 4 h of data, most of it from Ole's TS 12" Imaging Newtonean (f/4) with a modded Canon 6D. The other is my own Leo Triplet data, and only about 1 hour of it but I think it turned out rather ok (5" ES Apo with a Canon 60Da). Comments are always welcome of course Cheers
  39. 2 points
    Thanks very much Ken That looks very promising - great images That settles it - Rosette imaging with Esprit.
  40. 2 points
    I'm lucky to live in a darksite in south wales which is fantastic, but I used to live in hull where DS targets where near impossible, even the moon was orange due to the amount of light from the city, I'm very happy here, its heaven for skywatchers even the bats use headlamps . clear skys charl.
  41. 2 points
    Always amazes me when I see Orion upside down in the night sky. Thought I'd post a quick image I took for others to see how it looks
  42. 2 points
    Narrowband imaging is great for combating light pollution, but it works with mono cameras and not the One Shot Colour (OSC) camera such as the QHY8. If you spend some time with a FOV calculator such as this one you can put in a host of camera and scope combos along with targets and so you can get a feel for sensor size. No one but you can decide if a small sensor would be a problem. I rate mono camera's - They are versatile in that you can do narrowband imaging and so make the most of the clear skies. With NB you can ....almost... image when the moon is full, but I found that with a OSC once the moon was around at all then it was useless. So for me that meant that it was unusable for 2 weeks of the month .... guess when the clear nights come
  43. 2 points
    I may have had clouds the last time I tried to observe , just couldn't tell because of the fog .
  44. 2 points
    Yes indeed mate, yes I have started keeping a log now, not in category's tho more of a dairy... ive added my first posts from here into the beginning of it also. im starting to have a little go at taking pictures as well Doug, only afocal with my iPhone and iPhone telescope connector , my first couple haven't been that impressive tho haha jupiter and its moons are captured but Jupiter is over exposed its sphere shaped but no detail just bright (I know how to do the settings correctly now for detail) so im having another crack at it asap! i also took a 3 second exposure of the m1 .... Although the picture looks pretty it's certainly not how it's supposed to look haha I know why tho!!! Due to the earths rotation !!! Silly me haha I haven't got a motor drive yet!!! Haha I didn't know at the time I needed one for such tasks!!! (Being the complete novice in astronomy I am! Never mind astrophotographery ) i really didn't have a clue what I was doing but since making these errors I have become more aware. STILL HAD HEAPS OF FUN THO and that's what it's about isn't it buddy, will show you below nathan
  45. 2 points
    I suppose I should try to back up what I said... I like Wim's version a lot, but - call me Goldilocks - I would like the black point to be somewhere between your latest version and his. I downloaded your version and used the PS eyedropper tool to measure the background at various points. Your background was nice and even which is good. However the tool was putting the R,G & B values around the 35-36 mark. Olly Penrice (in numerous posts) has said that he aims for around the 22-23 mark - and who am I to argue with him. Colour intensity is now a matter of taste. You can go for dramatic saturated colours or you can go for a more muted effect. I have been a 'saturated' kind of guy, but increasingly I am admiring more restrained processing. It is very easy to increase noise if you just use Saturation in Photoshop. If you do just use Sat then I would suggest you do so as a layer and use blend mode 'Color'. Or you could try the following method: In PS duplicate the background layer twice so that you now have three layers all featuring the same image Change the Blend Mode of the Top Layer to 'Soft Light' Change the Blend Mode of the Top Layer to 'Color' Select Top Layer and do a 'Merge Down' to the layer below - you now have two layers. Run Gaussian Blur on this new top layer. Set it around the 0.6-0.8 mark. Flatten the image This was shown to me by Mr Penrice. Because it is a fixed routine, I have recorded it and have it saved as an action. So I first ran this routine. (Note you could run it more than once). Then I brought in the levels so that the background was at the 22-23 mark. I got this (I did no other processing - it took less than 2 minutes):
  46. 2 points
    My Ex pointed me at an app. called Sky Map (he described it as the 'old' Goggle Sky). On my phone, if I hold it up to the sky, it seems to know where it is pointed and near enough appears to overlay the stars on the sky with those on the screen as it is held up. Now I know such a thing would not be an option for the OP with a set of binoculars, but for demo purposes I wonder if mobile phone holding brackets could be added to some big telescopes to hold such overlay displays from apps. it might help show people on the ground where the telescope is pointing? I haven't had the chance to use it on a fine night yet, but I'm going try waving my own version at the sky next time just to check that I've got Polaris absolutely right. This is maybe a complete 'off the wall' idea, but 'hey, I'm an ideas person!'.
  47. 2 points
    A real Eye Opener these Stu. We know the Universe is really a violent entity, but the Serenity of these Images temper that notion somewhat. I've never seen these presentations before, and I thank you for posting this for us. There must be countless planetary systems throughout the Universe, that violence has resulted in. We're very lucky to be getting such fantastic close ups of our own systems residents. To The Scientists and Engineers who have made this possible, we owe a huge vote of thanks.
  48. 2 points
    Yes, it is possible to determine an approx orbit with just three obs. ( was it Newton came up with a method ? ), of a newly found asteroid, the wider the obs are spaced the better the initial orbit and usually good enough to predict where the asteroid will be in the near future to recover it and refine its orbit. (sorry dont remember the details, been too many decades since ) Done all the time by the minor planet people so there may be some further info there : http://www.minorplanetcenter.net/ or perhaps http://www.minorplanetcenter.net/iau/mpc.html
  49. 2 points
    This link discusses similar features on the asteroid Eros: https://science.nasa.gov/science-news/science-at-nasa/2000/ast26sep_1 Barringer / Meteor Crater (mentioned in the above link) in Arizona has a shape that is not dissimilar:
  50. 2 points
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