Akatsuki probe successfully enters Venus orbit, returns images
cnet.com
cnet.com
http://cnet4.cbsistatic.com/hub/i/r/2015/12/09/bccd7491-ac30...
Look how the cloud (or whatever it is) on the right is broken. The halves don't line up.
> This required placing the probe into "hibernation" or safe mode to prolong its life beyond the original 4.5-year design. JAXA expressed some confidence in keeping the probe operational, pointing to reduced battery wear, since the probe was then orbiting the Sun instead of its intended Venusian orbit
>At a press conference on 10 December, officials reported that Akatsuki's engines fired for less than three minutes, far short of what was required to enter into Venus orbit
>Three peri-Venus orbital maneuvers were executed on 1 November,[11] 10 and 21 November 2011 using the RCS thrusters. A total delta-V of 243.8 m/s was imparted to the spacecraft. Because the RCS thrusters' specific impulse is low compared to the specific impulse of the OME, the previously planned insertion into low Venusian orbit became impossible. Instead, the new plan was to place the probe in a highly elliptical orbit with an apoapsis of a hundred thousand kilometers and a periapsis of a few thousand kilometers from Venus.
[0]: https://en.wikipedia.org/wiki/Akatsuki_(spacecraft)#Orbit_in...
(Aside: that's actually a really neat trick, and this is the first I've heard of it being used.)
After the OME engine nozzle broke off and the engine became useless, the tank of oxidant became useless mass. (65kg.) So they dumped it overboard, simply venting it out the broken rocket nozzle. (Yes, the did point the vehicle in the right direction so that they could get some momentum change out of it.)
Making that decision, to dump irreplaceable fuel overboard because of a conclusion you've reached by looking at some telemetry graphs, is one that I am very glad I wasn't the one to have to make.
There are several clever missions to Venus proposed in the decadanel planning. But Mars and outer moons have priority.
*survivable in terms of temperature. It still has a 96% carbon dioxide, oxygen free atmosphere, so not directly habitable. The temperature is about room temperature at an altitude of 55km with atmospheric pressure (and T=75C) at about 50km. Earth atmosphere would float in the more dense carbon dioxide atmosphere of venus. You could conceivably have an airship full of earth atmosphere where the cabin is within the balloon.
sigh i miss those times.
As /u/ZenoArrow pointed out, it means "dawn" or in some contexts, "in the event... (of)"
It's used as the title for Akatsuki no Yona (Yona of the Dawn) but is otherwise only really known for being a certain group of characters from a certain anime which was implicated.
There are also a few characters who share the name, such as Akatsuki Ousawa. But that would refer to an individual and not a group.