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Wow that is really neat!

#science #physics #chemistry #ice



Wow! I've often asked myself why aerospikes didn't take off. There are obvious challenges but the advantage seemed to be worth exploring. This article is the most thorough exploration of that that I've seen. H/T @Erdayastronaut #space #rockets #science ... show more



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





#science #sciencemanuelacasasoli
A massive atmospheric release of radioactive 106Ru occurred in Eurasia in 2017, which must have been caused by a sizeable, yet undeclared nuclear accident. This work presents the most compelling monitoring dataset of this release, comprising 1,100 atmospheric and 200 deposition data points from the Eurasian region.
https://www.pnas.org/content/116/34/16750



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 arstechnica.com/science/2019/0…

There are several packages that will do a light-weight simulation. Universe Sandbox^2 and Space Engine are both commercial packages that include this sort of simulation. However, their simulations are very rough in scale, as far as I know or have seen, and while physically motivated, are not proper particle level simulations. That is, they simulate the interactions using particle models, but the particles are not at the scale of actual atoms and molecules, nor do they experience chemical interactions.

However, there is freely available code for massive scale particulate simulations. Check out https://wwwmpa.mpa-garching.mpg.de/gadget/

For example, the http://icc.dur.ac.uk/Eagle/ Eagle simulations are based on modified GADGET code.

Illustris and IllustrisTNG, http://www.illustris-project.org/data/ and http://www.tn... show more

@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!
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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.

https://physicsworld.com/a/how-high-the-moon/



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



On a lark I wanted to see if SETI@Home still existed...forget it's a whole ecosystem Berkley puts out called BOINC. Now I have clients for 6 projects running. Giving back a little bit. #science #hpc https://boinc.berkeley.edu/


It does sound pretty neat!