the rosetta team named two features on the comet after colleagues who passed away:

http://www.space.com/30878-comet-features-named-for-lost-colleagues.html

Much O2 got detected in 67p, 4%; it's pretty much and may change the way actual star formation are modelized, this is an important event.

not that much, but still plenty more than expected - from the esa:



The team analysed more than 3000 samples collected around the comet between September 2014 and March 2015 to identify the O2. They determined an abundance of 1–10% relative to H2O, with an average value of 3.80 ± 0.85%, an order of magnitude higher than predicted by models describing the chemistry in molecular clouds.
The amount of molecular oxygen detected showed a strong relationship to the amount of water measured at any given time, suggesting that their origin on the nucleus and release mechanism are linked. By contrast, the amount of O2 seen was poorly correlated with carbon monoxide and molecular nitrogen, even though they have a similar volatility to O2. In addition, no ozone was detected.

and

“We weren’t really expecting to detect O2 at the comet – and in such high abundance – because it is so chemically reactive, so it was quite a surprise,” says Kathrin Altwegg of the University of Bern, and principal investigator of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis instrument, ROSINA.
“It’s also unanticipated because there aren’t very many examples of the detection of interstellar O2. And thus, even though it must have been incorporated into the comet during its formation, this is not so easily explained by current Solar System formation models.”

arround 4%
no ozone nor variation caused by UV or cosmic rays, meaning it certainly come from the comet directly, that wasnt expected at all following actuals models.

not 4% but ~4% relative to H2O
see above and also http://www.scientificamerican.com/article/rosetta-sniffs-oxygen-around-comet-67p/

ofc it's 4% relative to h2o you dont see it on the chart ? (at left)



This post was edited by Saucisson6000 on Oct 30 2015 09:12am

two images half a rotation apart:



Comet 67P/C-G at 13:31:01 UT on 26 October from a distance of 312.7 km. The image scale is 26.6 m/pixel and the image measures 27.3 km across.



The view 6 hours later, at 19:27:53 UT, from a distance of 310.4 km. The image scale for the second image is 26.5 m/pixel and the image measures 27.1 km.

Since Comet 67P/Churyumov-Gerasimenko’s rotation period is a little over 12 hours, these two images are separated by about half a comet rotation, offering complementary views of the nucleus. In both orientations, jets can be seen rising from the sunlit side of the nucleus.

and here the latest picture released:



Single frame enhanced NAVCAM image of Comet 67P/C-G taken on 31 October 2015. Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

The scale is 25 m/pixel and the image measures 25.6 km across; the contrast was increased to bring out the comet's activity.

is it going to destroy all life as we know it or not? simple question