Prije nekoliko minuta preko Twitter-a je službeno najavljena nova press konferencija o rozeta misiji. Konferencija će se održati 14 Novembra (danas) u 13:00 GMT. Postoji i Google+ event kojemu se možete pridružiti na idućem linku:
https://plus.google.com/events/c78o050l93ub7cm4kcoltjnt424
Before few minutes was officially announced via Twitter a new media briefing about Rosetta Mission. The press conference will be held on 14th November (today) at 13:00 GMT. Also associated with this press conference a Google+ event exist so you can join if you want. The link follows:
https://plus.google.com/events/c78o050l93ub7cm4kcoltjnt424
Ja ću kao i obično pratiti cijeli događaj kao i ostale izvore informacija i ažurirati ovaj post prema potrebi.
I will as usual follow this event and update this blog post with all relevant and new information I find around using all news sources I have access to.
Samo da dodam evo zanimljive slike koja prikazuje mjesto sletanja onako kako ga vidi sonda Rozeta
Just to add, here is an interesting photo which shows the landing site as seen from Rosetta probe
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Update 1
Uprvavo je velika novost izašla na Twetter preko naloga: https://twitter.com/Philae2014. Druga velika novost je da sam upravo naučio da mogu embed tweet i da ne moram uzimati screenshot. Svi mi učimo po nešto iz svega ovoga :D.
Just this moment big news have come out from Tweet account: https://twitter.com/Philae2014. The other news is that i just learned how to embed tweets in blog directly. All of us will learn a lot from this events :D
Ali da ne duljim, evo ga Tweet:
But I digress, here is the Tweet:
Last night MUPUS hammered the penetrator into the ground. APXS also got to work! My team is currently checking how they did #CometLanding
— Philae Lander (@Philae2014) November 14, 2014
Što ovo znači? Ovo znači da Philae nije u previše problematičnom položaju čim može izvršiti bušenje površine. kako su to izveli vjerovatno će objasniti na konferenciji za štampu. Ja lično jedva prije čekam.What does this mean? Well it seems that Philae is not in to much precarious position as they can drill the surface of the comet. How they did it at the moment it is unknown but surely it will be explained during media briefing. I surely can`t wait.
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Update 2
Kometa koja pjeva / Singing comet
O čemu se radi?
Oko komete postoji slabo magnetsko polje koje se sudara sa sunčevim vjetrom što izaziva vibraciju ioniziranih atoma u razrijeđenoj komi komete (kometska atmosfera). Ovo stvara vibrirajući zvuk koji se može detektovati dovoljno osjetljivim instrumentima. Međutim ovaj zvik je preslab i veoma niske frekfencije tako da je za potrebe ovog klipa ubrzan i pojačan oko 10000 puta. Astronomi su bili poprilično iznenađeni ovim otkrićem jer se smatralo da je magnetsko polje kometa preslabo da izazove ovaj efekat. Sada treba otkriti odakle potiče ovakvo mjerljivo magnetno polje jer se smatralo da ga komete ne mogu imati.
Detale možete naći u ovom članku: http://blogs.esa.int/rosetta/2014/11/11/the-singing-comet/
What is all about?
Around this comet a very weak magnetic field exist which interacts with solar wind causing ionized gas from comets coma (comets atmosphere) to vibrate. This forms a sort of vibrating sound which can be detected with sufficiently sensitive equipment. This sound is to week to be normally heard so to make this audible clip the vibration was accelerated and intensified to come in to human audible range for about 10000 times. it was a pretty big discovery as scientist thought that comets have to weak magnetic field to produce this kind of effect. Now they must figure out a good explanation to explain how a small comet like this can generate such measurable magnetic field.
Details you can find in this article: http://blogs.esa.int/rosetta/2014/11/11/the-singing-comet/
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Update 3
Hangout link: https://www.youtube.com/watch?v=7Xm6y0LzlLo#t=42
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Update 4, last for today
Iz svega što je rečeno danas iz raznig izvora i uključujući gore linkovani hangout, može se zaključiti da je radni vijek landera pri kraju zbog potrošenih baterija. Na žalost pozicija na kojoj se lander našao ne dozvoljava solarnim panelima da prikupe dovoljno svjetlosti da proizvedu dovoljnu količinu energije za rad. Večeras će biti moguće posljednji kontakt sa landerom ako ga u opće bude. S druge strane postoji mogućnost da se lander probudi sam od sebe kada kometa priđe Suncu i nastavi sa radom kako se zračenje sa sunca bude povećavalo i kometa bude postajala sve aktivnija. Trenutno lander buši i uzima uzorke iz tla i svi se nadaju da će imati dovoljno energije da obavi posao i pošalje rezultate nazad na Zemlju, večeras, prije nego li baterije konačno izdahnu.
From all news found today, including the above hangout, we can assume that lander is about to run out of power soon, maybe even tonight. unfortunately the lander solar panels are not receiving enough radiation to produce enough power to power the small craft. Tonight will probably be the last contact with lander before batteries run out of power assuming that lander has enough power to do even that. There is hope that the lander will reactivate at later time as comet approaches the Sun and solar panels receive more light from it. At the moment lander is taking soil samples and everybody hopes that it will have enough power to analyse it and send data home.
Back to work! I’m now drilling into the surface of #67P… I’ll give you updates as soon as I can! #CometLanding
— Philae Lander (@Philae2014) November 14, 2014
S druge strane ako se uspije uspostaviti kontakt večeras, naučnici planiraju poslati komande landeru da obavi neke funkcije u pokušaju da se izvuče iz "rupe" u koju se uvalio i izloži solarne panele Suncu i tako produži svoj radni vijek. Ali to će biti riskantan potez jer lander na kometi teži jedva 1 gram pošto je gravitacija komete veoma slaba (oko 100 000 puta slabija nego na Zemlji) tako da takav manevar može imati nepredvidljive posljedice.
On the other hand, if mission control manages to make contact with lander tonight, they are planing to send a set of commands to try to make the craft dig it self out from the "dark hole" and expose it`s solar panels to the Sun. In any case this will be a risky maneuver because the weight of the lander is just about 1 gr (0.035 ounce) as gravity pull of the comet is minuscule (100 000 times lower than Earths) and this can cause unpredictable effects.
Međutim uzbudljivi period ove misije tek predstoji. Naime kometa se približava Suncu i pravo istraživanje tek predstoji, kako se komet bude budio pod uticajem zračenja i formirao gustu komu dok gasovi iz jezgre budu izbijali na površinu. Najbliži prolaz Suncu kometa 67P/Churyumov–Gerasimenko će imati u Avgustu 1915 godine tako da će najveći dio istraživanja ove komete biti urađen upravo u tom periodu. Ako sve prođe kako treba biti ćemo svjedoci stvaranja gejzira na površini kometa kako voda i zamrznuti ugljendioksid budu sublimirali stvarajući komu (kometsku atmosferu). Mnogi veliki izazovi tek predstoje kako se goleme količine gasa i prašine budu oslobađale sa površine. Ovo će biti tek pravi ispit za našu tehnologiju, da li će sonda izdržati i uspijeti se održati u tom divljem okruženju uzavrele komete?
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| Fotografija Halejeve komete sa sonde Giotto Photo of the Halley comet nucleus by probe Giotto |
But after all the most important period of this mission is not the landing of Philae (although it was historic event and milestone in space technology) but the comets approach closer to the Sun. The real science will start only then as comet wakes up from cold slumber and starts boiling off the water and carbon dioxide forming a vast coma around nucleus. 67P/Churyumov–Gerasimenko will be closest to the Sun only in August 2015 and we can expect big changes on the surfaces and a lot of science coming from Rosetta, giant geysers outgassing from surface and a lot of activity, as gas and dust envelop the Rosetta probe. Some real challenges to our technology are still ahead. Will the probe be strong enough to survive the wild environment of a boiling comet?
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