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Aart Bik@aartbik.bsky.social |
171 followers 155 following 54 posts
Dutch-American computer scientist
Utrecht (MSc), Leiden (PhD), Bloomington (post-doc)
#Google #Intel
#astrophotography #chess #compilers #sparse #vectorization
🌐 ef='https://aartbik.com'>aartbik.com
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Aart Bik
@aartbik.bsky.social
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Astrophotography remains a hard hobby, but here is a bit of a - how it started - how it is going - demonstration using two pictures of the Dumbbell Nebula (M27).
#astrophotography
2 replies 13 reposts 119 likes
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Aart Bik
@aartbik.bsky.social
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Happy 4th of July everyone! Today, let's celebrate our nation and look forward to a bright future together.
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Aart Bik
@aartbik.bsky.social
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At the end of a busy week, this is my happy place.
#astrophotography
0 replies 0 reposts 18 likes
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Aart Bik
@aartbik.bsky.social
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The awesome @harbers.bsky.social is 3-D printing a custom-sized Tri-Bahtinov Focusing mask for the 12'' Meade LX600. I am really looking forward trying this out to see if focusing will be easier from now on!
#astrophotography #telescopes
0 replies 0 reposts 10 likes
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Aart Bik
@aartbik.bsky.social
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M17 (Swan Nebula) through the Meade LX600 using stacked images of CCD camera
#Astrophotography
0 replies 2 reposts 15 likes
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Aart Bik
@aartbik.bsky.social
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X-Wedge mission accomplished! With the help of @elisabethbik.bsky.social and @harbers.bsky.social, the Alt-Azimuth mount of the Meade LX600 has been converted to an Equatorial mount!
#astrophotography
#meade
1 replies 0 reposts 21 likes
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Aart Bik
@aartbik.bsky.social
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The Meade X-wedge arrived today, to convert the LX600 fork mounts into equatorial mode. Unfortunately, a few tiny but essential parts are missing, so I will have to wait a bit longer for the conversion.
#astrophotography
0 replies 0 reposts 9 likes
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Aart Bik
@aartbik.bsky.social
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Even though I thoroughly enjoy the hobby for a long while now, I remain a mere beginning amateur in awe of what others are able to get out of their scopes!
1 replies 0 reposts 1 likes
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Aart Bik
@aartbik.bsky.social
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It is on my wish list!!! Especially now that I am getting into longer exposures, the field rotation is starting to become annoying.
1 replies 0 reposts 1 likes
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Aart Bik
@aartbik.bsky.social
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Just in case you are curious about my night-sky observation setup, here is the Meade LX600 with CCD attached to the laptop. We are getting some work done in the driveway, so the space is cramped. But still fun!
#astrophotography
1 replies 0 reposts 10 likes
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Aart Bik
@aartbik.bsky.social
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My first capture of the spiral galaxy M81, or Bode's Galaxy, through the Meade LX600 with a CCD. A hard target, given that most light pollution occurs north of my position.
#astrophotography
0 replies 5 reposts 54 likes
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Aart Bik
@aartbik.bsky.social
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A first attempt at stacking several frames of longer exposures (60s each) to capture the Eagle Nebula (M16) from my light-polluted driveway. Here is the first result!
#astrophotography
0 replies 2 reposts 26 likes
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Aart Bik
@aartbik.bsky.social
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Starting at v6.8.8, Chess for Android now supports the iChessOne foldable electronic chessboard!
play.google.com/store/apps/d...
0 replies 0 reposts 1 likes
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Aart Bik
@aartbik.bsky.social
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Again, the M5 globular cluster through the Meade LX600, but this time using stacked CCD images
#astrophotography
0 replies 2 reposts 16 likes
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Aart Bik
@aartbik.bsky.social
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Waxing Crescent Moon (composite photo through a Meade Instruments LX600).
#astrophotography #moon
0 replies 4 reposts 43 likes
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Aart Bik
@aartbik.bsky.social
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M5 globular cluster through the Meade LX600
#astrophotography
0 replies 0 reposts 15 likes
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Aart Bik
@aartbik.bsky.social
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While working on the PyTorch compiler backend that includes the MLIR Sparsifier with sparse tensor support, I also enjoy reading up on all the excellent textbooks available out there. Which one is your favorite? #python #pytorch #machinelearning
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Aart Bik
@aartbik.bsky.social
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Back home again after a very pleasant trip with the KLM.
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Aart Bik
@aartbik.bsky.social
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Typical Dutch: no parking for bicycles 🚳
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Aart Bik
@aartbik.bsky.social
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Taking care of the #jeepwrangler
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Aart Bik
@aartbik.bsky.social
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A good evening to get the Meade LX600 out of the garage.
#astrophotography
#moon
0 replies 3 reposts 17 likes
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Aart Bik
@aartbik.bsky.social
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I have worked on making Ads serve faster, large-scale graph computations in Pregel (awarded the 2020 ACM SIGMOD Test of Time Award), Chess/Checkers/Reversi on Google Play, Google Glass, the Android Runtime/Compiler (including a vectorizer for Arm/Intel), and MLIR with sparse tensor support!
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Aart Bik
@aartbik.bsky.social
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After a rough week, being out with the telescope sooths me.
#astrophotography
1 replies 5 reposts 42 likes
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Aart Bik
@aartbik.bsky.social
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Partial solar eclipse in California as seen though solar panels.
#astrophotography
#solareclipse
1 replies 3 reposts 25 likes
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Aart Bik
@aartbik.bsky.social
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Aart Bik
@aartbik.bsky.social
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The moon today. Through a Meade LX600 12'' with focal reducer.
#astrophotography
1 replies 5 reposts 23 likes
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Aart Bik
@aartbik.bsky.social
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My first attempt of a composite picture of the Orion Nebula (M42) to get a slightly larger field-of-view.
#astrophotography
0 replies 1 reposts 17 likes
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Aart Bik
@aartbik.bsky.social
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Not exactly the colors I was looking for, but probably the best I can do from my light polluted driveway. NGC 2264 taken through a Meade LX600 and Canon EOS T3i (with light pollution filter)
#astrophotography
0 replies 0 reposts 14 likes
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Aart Bik
@aartbik.bsky.social
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I just got the Meade ACF 0.68x Focal Reducer and, despite the many clouds, I had to take that first test picture to see the increased field of view (and change from f/8 to faster f/5.5). Now just waiting for clearer skies for better pictures! #astrophotography
0 replies 0 reposts 12 likes
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Aart Bik
@aartbik.bsky.social
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Conditions in Saratoga, CA are never ideal, but I here is a very faint NGC2024 (Flame Nebula) next to Orion's Alnitak.
#astrophotography
0 replies 2 reposts 15 likes
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Aart Bik
@aartbik.bsky.social
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I keep experimenting with the Orion Nebula. This time with the Meade LX600 and a Canon Rebel EOS T3i with light pollution filter and some minimum post-processing. Not bad, given that it was actually quite a cloudy night...
#astrophotography
1 replies 3 reposts 19 likes
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Aart Bik
@aartbik.bsky.social
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I don't often take the waxing crescent, but here is one. Taken with the Meade LX600, composite of two photos.
#astrophotography
0 replies 3 reposts 18 likes
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Aart Bik
@aartbik.bsky.social
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What really impresses me about LEGO is that it's not only rare that pieces are missing from their sets, but also when they *are* missing, they send you a replacement to continue the fun! Thanks!
0 replies 0 reposts 1 likes
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Aart Bik
@aartbik.bsky.social
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The MLIR Sparsifier team is looking into connecting PyTorch's sparse tensors to the MLIR sparse tensor types through TORCH-MLIR. If you have some interesting PyTorch models that use torch.sparse, please send them our way! #MLIR #PyTorch #Sparse
discourse.llvm.org/t/rfc-sparse...
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Aart Bik
@aartbik.bsky.social
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What better way to illustrate different sunrises at different latitudes than by using the Lego Globe?
#Astrophotography #astronomy
youtu.be/1JcnduDNeOU
3 replies 10 reposts 69 likes
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Aart Bik
@aartbik.bsky.social
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I usually take moon pictures with the Meade ETX90EC due to its wider FOV. Today I tried to take a composite picture with the Meade LX600, stitching two pictures together. What do you think of the result?
#astrophotography
0 replies 5 reposts 38 likes
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Aart Bik
@aartbik.bsky.social
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Betelgeuse is a red supergiant star and is most likely to end with a supernova explosion, most likely within the next 100,000 years. So, every night may be the last time we see it!
#astrophotography
0 replies 3 reposts 39 likes
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Aart Bik
@aartbik.bsky.social
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Moon through Meade ETX90EC
#Astrophotography
0 replies 2 reposts 20 likes
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Aart Bik
@aartbik.bsky.social
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On the left, my picture of Jupiter through the Meade LX600 with CCD stacking. For comparison, at the right, I also show the StarryNight Pro 8 screenshot of Jupiter at about the same time.
#Astrophotography
0 replies 2 reposts 12 likes
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Aart Bik
@aartbik.bsky.social
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Using my free time to bake an apple-pie together with my daughter! Very different from working with sparse tensors for sure...
1 replies 1 reposts 6 likes
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Aart Bik
@aartbik.bsky.social
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A cloudy night, so not much stargazing, but at least one quick photo of the moon, with the good old Meade ETX 90EC this time.
#astrophotography
0 replies 5 reposts 19 likes
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Aart Bik
@aartbik.bsky.social
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I posted a brief video on connecting Chess for Android with the House of Staunton and Zmartfun sensory board and clock combination.
#chess #android
youtu.be/FyOgrkSHZ9M
0 replies 0 reposts 1 likes
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Aart Bik
@aartbik.bsky.social
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I have not had even one night of proper viewing in the past few weeks here in Saratoga, CA. In the meantime, the Meade family of telescopes is waiting patiently in the garage....
#Meade #astrophotography
0 replies 1 reposts 10 likes
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Aart Bik
@aartbik.bsky.social
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Chess for Android now also supports the House of Staunton sensory chess board (in addition to the Certabo, Chessnut, Chessup, DGT, and Millennium chess eboards). You can download my chess app from Google Play.
play.google.com/store/apps/d...
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Aart Bik
@aartbik.bsky.social
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The #MLIR Sparsifier team is a proud part of Google Research, which also has the privilege of residing in the beautiful new Gradient Canopy building in Mountain View.
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Aart Bik
@aartbik.bsky.social
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Yes, Silicon Valley ;-). Where I am, Saratoga CA, it is a bit better, but far from ideal.
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Aart Bik
@aartbik.bsky.social
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This is an amazing photo. I am still having a hard time finding this nebula :-)
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Aart Bik
@aartbik.bsky.social
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Attaching the Field-of-View indicator using a Starrynight software screenshot.
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Aart Bik
@aartbik.bsky.social
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Orion Nebula (M42), 11/23/2023 from driveway in Saratoga, CA, single shot with Canon through Meade 12''
#astrophotography
2 replies 2 reposts 21 likes
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Aart Bik
@aartbik.bsky.social
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I just upgraded my Starrynight version Pro 4.5 to the latest Pro 8 and I am loving it so far. I can now control my Meade LX600 from my laptop and get a very accurate POV for all my equipment. For example, compare the Canon picture of M27 with the predicated POV.
#astrophotography
0 replies 0 reposts 6 likes