There Is Actually Sound In Space, Humans Just Can't Hear It
It's often stated that there is no sound in the vacuum of space, but it's more correct to state that there's no sounds that humans can hear in the vacuum of space, the atmospheric density never goes to zero and so sound waves can still be carried through the vacuum by pressure waves. The ultra low density gas only allows very long wavelengths to propagate, and some astronomical phenomena produce notes so low that they'd be measured in femtohertz.
It's been months since DSCOVR stopped sending out regular images of the Earth, from the L1 point between the Earth and the Sun. At this point the prospects for recovery seem remote so I took the data we have and compiled some cleaned up animations showing views of the Earth from the space. The video shows how the viewpoint changes through the year as the Earth orbits the sun and the spacecraft librates around the Lagrange point.
Code for warping images is here:
https://github.com/illectro/dscovred/blob/master/dscovr.py
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https://www.youtube.com/watch?v=xPM2kITNtTs
It's almost 50 years since Apollo 13 lifted off onto what would become the definition of the 'successful failure', a mission where lives were very much at stake and the teams at mission control had to solve problems they'd not expected to bring the crew home safely.
I wanted to re-create the 'adapter' that the crew had to make which would allow the Lithium Hydroxide canisters from the command module to work with the Lunar module's environmental control system. Using only the things they had on hand the crew had to 'fit a square peg in a round hole' so that they atmosphere would have remained breathable for the return
Some good references for this procedure are on NASA's history site.
https://www.hq.nasa.gov/alsj/a13/a13_LIOH_Adapter.html
https://history.nasa.gov/afj/ap13fj/15day4-mailbox.html
I 3D printed my canister prop using a design from Havazik, he was able to put this together in a couple of hours, I'd have taken days.
https://www.thingiverse.com/thing:4245738
The 3D printer I use is a Prusa MK3 and it was a gift from Prusa Research, It was able to handle the filament running out and resumed after a power cut during the main print.
http://prusa3d.com/
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https://www.youtube.com/watch?v=pPBKBOuyYPI
Discovered in 1999 - Minor Planet 33434 has recently been named 'Scottmanley', I didn't discover it, but one of the team members chose to name the object on my behalf.
It's common for asteroids to be named to recognize people who have risen to prominence in many fields - Astronomers, Artists, Athletes, and the occasional Pet (although that's been discouraged recently). I'm grateful to Alain Maury who made this possible.
Here's the official name on the Minor Planet Center's website
https://minorplanetcenter.net/db_search/show_object?object_id=33434
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https://www.youtube.com/watch?v=oIQ2byD6b6o
You can edit the parameters of some modules in KSP to make them lighter, or change their performance - I hack together a more viable engine and landing gear for a Mun landing. I also show that exceeding the engine's limits can cause odd problems.
So, for details:
I Take the LiquidEngine2 and make LiquidEngine3
arttachrules get changed from 1,0,1,0,0 to 1,1,1,1,0 so I can attach stuff to the side of the engine
mass gets reduced from 2.0 to 0.5
maxthrust gets reduced to 40 from 175
fuelconsumption gets cut from 7 to 1.5
The Lateral decouplers which I use for langing legs get their mass reduced from 0.4 to 0.1
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https://www.youtube.com/watch?v=4WwKraohGz0
So, now the question is whether all my number crunching actually pays off and the vehicle makes it to orbit with 4 passengers on board.
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https://www.youtube.com/watch?v=0EkFdyqMojg
Now that Call of Duty has taken a giant step into deep space I wanted to cast a scientific eye over the settings and set pieces and how they compare to scientific reality.
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https://www.youtube.com/watch?v=8NJ293dfv00