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A one-second video taken by the Rosetta probe on the surface of a comet

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Re: A one-second video taken by the Rosetta probe on the surface of a comet

#51

Post by FranOntanaya »

orbital-decay wrote: post #27
Gravityloss wrote: post #21

ESA PR is basically hopeless. It's the polar opposite of NASA. I guess the budget is nonexistent. Good that there are people that disseminate these things on Twitter etc. The Rosetta and Philae stuff, Emily Lakdawalla of Planetary Society did a better job of covering it than anyone at ESA, unfortunately.

To be fair, Emily Lakdawalla also did a better job covering the Cassini-Huygens mission than anyone at NASA. Her reporting about the Huygens RUSO/TUSO mishap and the overall mission coverage was top notch.

There aren't a whole lot of cases where Planetary Society aren't doing the better job. Two that come to mind for me are Marc Rayman's Dawn journal https://www.jpl.nasa.gov/blog/author/marc-rayman/ and HiRISE's outreach https://hirise.lpl.arizona.edu/

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#52

Post by mrb »

The HN title is wrong. This was not taken "on the surface", but from a 13-14 km orbit, according to source ESA data (click on a picture to see its data): https://imagearchives.esac.esa.int/index.php?/category/410/s...

Each picture is a 12.5-second exposure. Therefore this 25 fps video is sped up 312.5×

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#53

Post by scott_s »

Tepix wrote: post #34
tenaciousDaniel wrote: post #31

Earlier quoted context omitted.

JS is poorly understood in comparison This might be the most hilariously ridiculous true statement I've ever heard.

In javascript: x == x _ is true. Good. x == !x _ is also true. Oops? And guess what: Array(3)==",," _ is also true. But NaN == NaN _ is false. Math.max()>Math.min() _ is also false! but then again Math.max() Madness, I tell you!

NaN not being equal to itself is true in all languages with IEEE compliance: https://en.wikipedia.org/wiki/NaN

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#54

Post by soru »

adonovan wrote: post #50
mark_edward wrote: post #16

Earlier quoted context omitted.

To be fair, people have been studying and predicting celestial movements for millennia, and boiled it down to unbelievably precise mechanical formulae. JS is poorly understood in comparison. I say this to hope you feel better at work. I've been pressed into frontend web work and it's fractal complexity.

It's true. Some of the greatest minds have spent 20 fruitless years trying to discover a unified theory of object fields and elementary values in JavaScript.

Has everyone given up on string theory, or is there still hope another few hundred genius-years will bring progress?

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#55

Post by mikeash »

mrb wrote: post #52

The HN title is wrong. This was not taken "on the surface", but from a 13-14 km orbit, according to source ESA data (click on a picture to see its data): https://imagearchives.esac.esa.int/index.php?/category/410/s... Each picture is a 12.5-second exposure. Therefore this 25 fps video is sped up 312.5×

Thank you! I couldn’t figure this out, as I thought the probe was shut down on impact. This makes much more sense.

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#56

Post by robotresearcher »

bwang29 wrote: post #12

To put things in perspective, the comet, 67P/Churyumov-Gerasimenko, is about 4km in diameter, moving at 135,000kms per hour. Rosetta's rendezvousing with the comet required travelling a cumulative distance of over 6.4 billion kms. Gravity assists were needed from four planetary flybys – one of Mars (2007) and three of Earth (2005, 2007 and 2009) – a long circuitous trip that took ten years to complete. Now back to my…

Moving at 135,000 km/h relative to what? (honest question)

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#57

Post by VikingCoder »

bd wrote: post #35

Unfortunately Twitter butchers video quality. I remade both landru79's videos from scratch using original ESA 2048x2048 image sequence (plus I added a bit of motion interpolation): http://alteredqualia.com/tmp/rosetta/rosetta.webm [50MB] http://alteredqualia.com/tmp/rosetta/rosetta_stars.mp4 [28MB] ----- Edit: in case my server doesn't hold up, here are video mirrors on Streamable: https://streamable.com/w2wgj https:…

Dear NASA -

Science is amazing. Don't forget to make it relatable by doing work like this! People love to see great images, so you gotta curate them and highlight the stunning stuff like this!

Re: A one-second video taken by the Rosetta probe on the surface of a comet

#59

Post by VikingCoder »

iliketosleep wrote: post #30
dehef wrote: post #25

Earlier quoted context omitted.

Observable.of(rosetta) .map(rocket => gravityAssist(rocket,'Earth')) .map(rocket => gravityAssist(rocket,'Mars')) .map(rocket => gravityAssist(rocket,'Earth')) .map(rocket => gravityAssist(rocket,'Earth')) .do(rocket => land(rocket)) .do(rocket => tweetVideo()) .catch(error => kaput(error))

Or just simply: npm install rosetta-67P-rendezvous

Oops. The new probe smashed into Mars at 146 km per second.

It was a leftpad error.

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