Pierre Harter: I live in the Seychelles... watching and reading the live updates... I am 54... I remember listening together with my parents to Neil Armstrong on the BBCWService, there was no TV here in those days... technology has changed and with it our frontiers... The "selfie" Rosetta is one of the astonishing pics this century. Goose pimples. Ground Control to Major Tom.

BBC's Sky at Night presenter Prof Chris Lintott sends this image from the briefing room at Esa headquarters.

"Comets may be closer than they appear..."

Jonathan Amos
Science correspondent, BBC News

So why is the radio reconnection two hours after separation so important? Because it means whatever happens at the surface, we will at least get some pictures and environmental data acquired during the descent.

I'm really looking forward to the "goodbye" pictures that Philae was supposed to have taken of Rosetta. They'll be iconic - images for the history books; but they have an engineering importance as well because they will show us whether the lander came off the mothership in a stable configuration.

Stand-by.

Peter King, Scunthorpe: @esa, It should be us who should be thanking you guys, letting us share this monumental challenge live. Especially after so many of you have dedicated years to this project. Good luck to you ALL.

Peter Johnstone, East Sussex: What a mind-bending project! Given that the technology within Rosetta is at least 11 years old, can anyone tell me how different the project would be if current-day technology could be deployed?

This would give a great insight into technological development over this period and assist in understanding the extent to which the scientists are currently constrained.

There's now an interview, external with enthusiastic, tattooed Rosetta project scientist Matt Taylor in the "key video" tab above. He says he is so confident Philae will successfully land that he has got himself a new tattoo to celebrate.

I bet you didn't know that the Comet 67P can sing... Listen to it here, external.

Rosetta's Plasma Consortium (RPC) has uncovered a mysterious "song" that Comet 67P/Churyumov-Gerasimenko is singing into space.

The comet emits its song in the form of oscillations in the magnetic field in the comet's environment. It is being sung at 40-50 millihertz, far below human hearing, which typically picks up sound between 20 Hz and 20 kHz.

To make the music audible to the human ear, the frequencies have been increased in this recording. Thanks Esa!

Image source, ESA/Rosetta/NAVCAM

Andrew Hodson: To say this mission has created more interest than the first moon landing has left me in despair - Apollo Eleven absolutely gripped nations the world over. I can remember getting up in the middle of the night to watch Armstrong's first steps on the moon.

Don't forget you can also follow developments on the BBC's TV news channels.

Rebecca Morelle stands by to interview Prof Mark McCaughrean, ESA's senior scientific advisor.

Daniel Varnam: And today's topics with my 6th formers? Kepler's Laws, rocket dynamics, and gravitational fields. Thanks ESA!

Gary Watt, Aberdeen, Scotland: This is quite fantastic. Safe landing Philae... and hurry up with the photographs :)

One of the instruments on the Rosetta Philae Lander - Multi Purpose Sensor One showed us its anchor harpoons in a tweet., external "My last sensors are mounted inside the @Philae2014 lander anchor harpoons. An accelerometer and a temperature sensor."

Image source, Esa

Jonathan Amos
Science correspondent, BBC News

ESA flight controller Andrea Accomazzo talks through the separation moment with Philae co-principal investigator Jean-Pierre Bibring.

Accomazzo's team has done everything it can to give Philae the best opportunity of landing.

Will Prof Bibring now get to realise his dream of doing science at the surface of a comet?

Phil Chadwick: This is truly momentous... The technology involved to be able to do what is being attempted is mind blowing... I hope they are successful, because the pictures from the surface will be unlike anything we have ever seen before..

I also think that based on the technology being used here, we would be able to defend our world against a collision from one of these comets...

Here's an impression of what Philae looks like on its journey to the ice and dust of comet 67P.

Image source, Esa

The next key developments will come from about 11:00 GMT, when Rosetta and Philae will hopefully be in radio contact.

Here's hoping for some nice "goodbye" images of the separation.

tweets, external: Thanks for all your great messages of support, too many to answer but it is great to have you all with us on this adventure #cometlanding

George Brooke, Cambridge: Somehow this has generated as much interest, if not more, than the original moon landings. If we can sustain the interest it will significantly help the upcoming generations understand that there are still challenging careers out there.

@Super_Vi_ tweets:, external 10 Years between decision and launch, and again between launch and landing. Long-termism #Rosetta #CometLanding

@BriKi tweets:, external Huh? Oh no we're not up to much as a species, just landing a spacecraft on a distant comet is all. @esaoperations @ESA_Rosetta #CometLanding

Michael de Halpert: All of us here in Zurich are on the edge of our seats! Go Philae! Go Rosetta!

Image source, Esa