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I never heard this story before. It's a really neat brief tour of the analysis done to figure out what they thought was a newly discovered asteroid was really an old Saturn rocket stage #


I'm totally watching this show :) # # #
He looks like Richard Dean Anderson in Stargate SG-1 🤔


Wow beautiful shot! #.
# #space

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It's fascinating that we've probably seen two massive asteroids collide but it was in a distant solar system not ours. The forensic analysis on this makes me want to try to do solar system evolution modeling again. Seems such a cool area of study. #
That said - we have seen post-collision debris here in our own solar system. These involve much smaller impactors, since we just don't have that many large impactors zipping around nowadays.

But since we're so close, we can see them in detail and we don't confuse them with other things (such as a planet or comet).
@Isaac Kuo Oh neat I hadn't heard of that before!


This AAS presentation on sustainable lunar surface operations looks fascinating. April 23 at 3 pm eastern. # #


This is some very amazing and exciting news from the space industry. Hats off! # #



I meant to post this yesterday. We take satellite weather data for granted nowadays. Until April of 1960, 60 years ago, it had never been done before though. # #

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@Christoph S Hm. Interesting point. I thought all astronauts went through quarantine before launch. Wonder if everything gets hosed down with disinfectant too?
Yeah astronauts go through a quarantine procedure but it may have to be bumped up from where it is to make sure there is margin for a three sigma bad incubation period.


# #


Another very neat cosmological model. I wonder if something like this can be simulated in @UniverseSandbox ? # # #
That would be a nice thing to try if you have Universe Sandbox. 😀



"Innovation and Sustainable Exploration" at this year's Goddard Memorial Symposium. Looks fascinating # #


I could watch this all day...more fascinated by the red clustering than the green (around libration point). Although the size of the stable area of the liberation point regions is interesting too. # # #



Yep the technical quantum leap accomplished by the Luna 3 team back in the 1959 is very impressive. #space #history

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Cool story and animation and relevant to the work I'm privileged to be a part of with @b612foundation in helping improve our ability to detect, track, and if necessary avoid collisions with near earth asteroids. #space
@Matteo Kepler Painless????
Getting cooked only hurts for a while - then you hardly feel it! Great for the arthritis too. ;)


You've probably seen it before (I know I have) but it's cool every time #space #science


An Infrared View of the M81 Galaxy

#nasa #photo #photography #space
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My various open source contributions from July/August. A lot of travel in the way but biggest update was starting my contributions to @b612foundation to help with improving asteroid tracking #programming #space #foss

That said, even Soyuz didn't have an onboard computer initially, so if this was so old, it was not intended for space but for ground equipment.

The Soviets liked automation, but you can do a lot with clockwork and mechanisms, and they did.

@sohkamyung @hankg
That's a fascinating site on Soviet space computing. Thanks! :-)



The astrophotography you can get with backyard equipment is pretty astounding #space #photography


Mesmerizing #space


Pair my previous "live" Apollo 11 audio/capcom link with this "live" vis by @AGItweets and their STK tool (they are within 13 seconds of each other) #space #history


Pair my previous "live" Apollo 11 audio/capcom link with this "live" vis by AGI and their STK tool (they are within 13 seconds of each other) #space #history


So cool! The Apollo 11 mission in real time (shifted 50 years of course) ( H/T @Christoph S ) #space #history:
Watching the stream of the original launch on and off all afternoon. More space! Fewer cages!
The other thing is, the post-launch was "animation" of the rocket. Now, we can see it in real-time and real life directly from cameras on the rocket.


Every time I see stories like this I want to fire up some mod/sim software and try to simulate it. There must be some open source or public domain software for this but needs a hefty computer...hmm...brain rationalizing... #space #science…
@Howard C. Shaw, III Thanks! I've dabbled with Universe Sandbox under steam and you can do some neat things but yes it's not exactly what I'm looking for. The above links look very interesting indeed. I found some open source framework but I can't find it now. I'll post it here if I do figure it out though. Thanks for the links!


I had heard about the laser ranging experiment on Apollo 11 but hadn't read about how it got there or how it went from the ground. We learned a lot from a simple experiment. #space #science
You may also like this article from Physics World which has more info on that experiment and the current challenges with it, like determining distance to the moon in millimetres.


I really liked his explanation targeted at the every day viewer. Very well done. Also learned something new. I didn't realize the Soviet rockets rotate the launch pad instead of doing a roll program at launch. #space

YouTube: Why do cylindrical rockets roll? (Everyday Astronaut)

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Using spare CPU cycles to give back through "volunteer computing" distributed computing system BOINC #hpc #science #space


Use the Apollo computer to mine bitcoin? Technically yes but at 1 hash every 10 seconds, no. Fascinating coverage of how to develop for it though! #retrocomputing #space
The conclusion nicely puts the power of the AGC into its period context. Not a bad machine for its day given that they required it to be small light and rad-hardened.
@Stephen Gunnell Yeah as they said it was relatively underpowered at 40K add operations per second compared to other computers of the day but other computers of the day were also far more massive. It's pretty amazing how well it performed against microcomputers 10-15 years later. I found this article on benchmarks from 1977. Looking at the integer add test Microsoft's BASIC took 10 seconds to do 1000 additions. At 40 KIPS the AGC would have done it in 0.0125 seconds. If we say that the comparison took up as much time as the addition and the BASIC interpreter is 10x slower than the same routine written in assembly language then we'd still be looking at the AGC being 10x faster. This makes me want to rerun these benchmarks and write them in 6502 Assembly as a comparison lol.


I have seen reports on the nature of the errors (basically computer was asked to compute more than it had capacity for) but not the why or the fail-over modes if the condition persisted. Great article #space #retrocomputing

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India is planning on launching its own Salyut-class space station in the next decade. That's about twice the size of the Chinese Tiangong stations launched to date but a third the size of their next planned one, and 1/20th the size of the ISS. #space



Random image from the archives

APOD: 2003 June 24 - The Sun's Surface in 3D

How smooth is the Sun? The new Swedish 1-m Solar Telescope, deployed in the Canary Islands only last year, allows imaging of objects less than 100-km across on the Sun's surface. When pointed toward the Sun's edge, surface objects now begin to block each other, indicating true three-dimensional information. Close inspection of the image reveals much vertical information, including spectacular light-bridges rising nearly 500-km above the floor of sunspots near the top of the image. Also visible in the above false-color image are hundreds of bubbling granules, each about 1000-km across, and small bright regions known as faculas.

#astronomy #picture #space #NASA #APOD



APOD: 2019 February 3 - An Airglow Fan from Lake to Sky

Why would the sky look like a giant fan? Airglow. The featured intermittent green glow appeared to rise from a lake through the arch of our Milky Way Galaxy, as captured during 2015 next to Bryce Canyon in Utah, USA. The unusual pattern was created by atmospheric gravity waves, ripples of alternating air pressure that can grow with height as the air thins, in this case about 90 kilometers up. Unlike auroras powered by collisions with energetic charged particles and seen at high latitudes, airglow is due to chemiluminescence, the production of light in a chemical reaction. More typically seen near the horizon, airglow keeps the night sky from ever being completely dark.

\#astronomy # # # #