Sky_walker

I'm hardly "obsessed" but I did few replicas. Let's see.... - Soyuz - Orion - SLS - Rosetta - Ariane 4 - Ariane 6 and the one I published on a forums: - Ariane 5 + ATV

Image gallery on ESA website with high-res images That crater on a smaller blob... wow...

Ekhm......

No it wouldn't. It's not enough thrust even for a station keeping. And these things don't scale well - just to give you a rough idea: Small solar sail on IKAROS satellite produces ~22 times as much thrust as this thing, yet: it only weights a tiny fraction of what that metal box does. BTW: grats for 600 posts.

And we have a first analysis of potential landing sites for Philae: There's 21 science instruments on Rosetta and Philae - sounds like a sh1tton of science points!

You mean: this nitrogen ant this oxygen? The one N2 that weights 28 g/mol and the one O2 that weights 32 g/mol? How exactly 32 is less than 28? Sorry, but my chemistry skills always sucked...

There is no special law that makes oxygen be blown away and nitrogen stay on a planet.

"Hello Comet" in all of the ESA-members languages: Bongu, kometa! Labas, kometa! Sveiki, komÄ“ta! Tere, komeet! Ahoj kometa! Helló, üstökös! Pozdravljen, komet! Moïen, Koméit! Dia dhaoibh uilig ar cóiméad! Γεια ÃοÅ, κομήÄη! Salutare, cometă! Ahoj kometo! Witaj, kometo! Hej, komet! Hei, komeetta! Hallo, komet! Hallo, komeet! Olá, cometa! Ciao, cometa! Salut, comète! Hola, cometa! Hallo, Komet! Hello, Comet! Pretty much every single ESA country contributed something to the Rosetta mission (inc. lander). BTW: Official press release on the arrival: http://www.esa.int/Our_Activities/Space_Science/Rosetta/Rosetta_arrives_at_comet_destination

Guys at ESA published an animation of arrival:

hahahaha # 67P comparing to the London city center: # Guys at ESOC made a 3D print of a comet Any my favourite quite so far: "Today is an important day, cause we get paid."

And it's all done Well done ESA! As the guy said: "We've never seen temperature (of the thruster) go so clean and so smoothly"

Simple: It's a game. Not a logical physics simulation.

And we have a burn It'll last ~6 minutes, in 22 minutes after that we should get a signal back with telemetry. This afternoon we should have some pictures from the OSIRIS high-resolution camera. lol@the elder guy - "this is a very high precision instrument, not an Opel or Fiat"

Yep Latest news from ESA:

KSK - I already replied to that post, so won't repeat myself, but as for the title - that's like... the most generic title you could possibly put there. No idea what kind of "clue" is it suppose to be.

o_O If anything - it's in the interest of Space X itself. It should be obvious that it's a commercial company, not some charity organization helping humanity. As for whatever there's a group of SpaceX fanboys here or not - I won't dispute that, cause I'm too new on this forum, but.... IMHO: It'd be good to report on a launches that are at least marginally important in a grand scheme of things - as in: testing new technologies, solutions, anything that pushes space flight further - and this one most certainly is not.

ekhm... sorry to interrupt, but: what's so important about this launch that it deserves it's own topic? or are we going to make a new topic about every single launch that happened? Cause if so than we missed quite a few this and previous month.

15 hours 15 minutes till arrival. Live transmission from the event will be available on http://rosetta.esa.int/

Here is the orbit shape - first probe will follow "triangular orbit" making burns at each "corner", and then enter classical, elliptical orbit. Here is more detailed description: http://blogs.esa.int/rosetta/2014/08/01/how-rosetta-arrives-at-a-comet/ Random relevant quote:

They did not. One lab registered magnitude(s?) higher "thrust" than the other. They didn't describe the reference device, so it might have been everything: from a metal box with identical size and weight down to the exact same device only with no power applied. And if that's the case than NASA just discovered an ultimate drive: no power required and yet: produces thrust! Now that's something! Why there's no hype on that?! Cause people don't read and they blindly believe that there is a reason to hype EmDrive. I'm afraid we will, cause I very much doubt they'll fund further studies any time soon based on the results of this experiment.

Just to clarify - you can see barely a few cosmic ray flashes. These are short lines between the stars. These weird black-white gradients that you see in a middle are a combination of several pictures at different exposure, enhanced to show the shape of coma. It's so very faint that you wouldn't be able to see much in a single, solid picture - basically: middle would be huge bright spot, and you wouldn't have any idea how large comet is in a context of a whole picture (comet is that small white blob in a very middle). Rosetta will follow comet as long as possible, even after the end of a mission it'll remain on an orbit around the comet, but in general schedule is as follows: In 3 days - orbital insertion burn, basically: arrival to the comet 2014 November - Philae lands on a surface 2015 August 13 - Comet perihelion 2015 December - Planned end of a mission, comet second nearest pass to the Earth It's an extremely risky mission, because noone really knows how comet will behave near sun with spacecraft in such a proximity, and it's most unexpected shape might cause it to break up in half - which would be something unseen ever in a history by humans from so up close. Philae, the lander, will also perform very risky operation - first ever landing on a comet - trying to harpoon into it (yes, Philae will basically be an interstellar Captain Ahab) and then drill-down in a hope to stay steady, but... truth to be said: there's so many unknowns ahead that anything might happen. That's why this whole thing is so interesting and exciting - this mission will perform numerous studies that never were done in a mankind history, including some very risky operations, boldly going when noone has ever gone before.

Or still fighting radiation from one failed launch....

Venture Star and from these less realistic... I guess moon bases planned between '50s and '80s.

Just like it doesn't make any sense to write huge headers in news media about "impossible drive working" while in their experiment non-functional metal box produced exactly the same results as the "drive" they were testing. Hype in media and on a forums over this whole thing went waaaay over the board.

ESA today successfully completed 13 minutes burn approaching comet Thruster temperature graph during burn: Here's how comet looks like in a frame of NAVigation CAMera from mere 500km away: NAVCAM is an APS sized CCD camera weighting 10 kg (including lens, lens-shade, heating, shielding and electronics) with a circular field of view equal to 5 degrees - that's comparable to APS-C Nikon*/Sony/Pentax DSLR shooting square photos with a 270mm lens. If you'd try to take a picture of a moon from surface of Earth with that focal length it'd look more-or-less like that: That's considered wide angle by space-probe-standards . NAVCAM resolution is 1 MPx (1024x1024px), and photos are taken with exposure time of 30seconds. NAVCAM sensor doesn't have any color filter array so it takes black-and-white photos capturing a full spectrum (kind of similar to Leica Monochrome - which also has a CCD sensor withouth CFA). Like all of the temperature-sensitive electronics - NAVCAM needs to be heated, in this case: It's between -25 and 0°C for operations and -50 to +50°C in a sleep mode - but optics also require heating, as glass changes it's optical and physical properties depending on a temperature, so NAVCAM lens needs to be constantly kept at a temperature between -60 and +60°C. * Nikon designation for APS-C sensors is "DX". Canon DSLRs are using different crop than majority of other DSLRs - x1.6 instead of usual x1.5.