Nasa's spacecraft New Horizons soared past Pluto at 12:50 BST on 13 July
After a tense wait, its first post-flyby communication was received at 01:52 BST on 14 July
The probe's historic early pictures of Pluto included a close-up of mountains over 3,000m high
Both the dwarf planet and its giant moon Charon appear to have surprisingly active geology
A bright, heart-shaped region on Pluto's surface was named Tombaugh Regio after the planet's discoverer
We're now ending our live coverage of the Pluto flyby.
If you're in the UK, turn on the ten o'clock news on BBC One.
Everyone else - check the BBC News website over the coming days, weeks and months for more Pluto developments!
Image source, NASA-JHUAPL-SwRIThanks for reading - and congratulations New Horizons.
After a frantic couple of days, the little probe is already 1,644,000km away, external from Pluto and not slowing down.
Bon voyage!
Image source, NASA/JHUAPLThe Nasa briefing has concluded but if you're in the UK and you can't get enough of the #PlutoFlyby, turn on BBC One for the ten o'clock news.
Our science editor David Shukman will be summarising the new findings.
If you've been following our live blog since that dramatic pre-flyby picture arrived, you might remember this...
Well, today a barista has bitten back:
A spacecraft flew past Pluto for the first time yesterday.
Today we are discussing the findings.
As some of the chat on social media points out - this science is raw, to say the least!
Chris Lintott is an astrophysicist and co-presents The Sky At Night for the BBC.
Alex Parker is a researcher at the Southwest Research Institute who is involved in image processing for the New Horizons mission.
The mission team are clearly - sorry - over the moon.
Quote MessageI don't think any one of us could have imagined it would be this kind of toy store."
Alan Stern, Principal investigator, New Horizons
Quote MessageThis is what we came for."
Will Grundy, Co-investigator, New Horizons
Quote MessageThis exceeds what we came for."
Dr Cathy Olkin, Deputy project scientist, New Horizons
Jonathan Amos
Science correspondent, BBC News
Wow, they didn’t disappoint, did they? And the audience in the theatre here at the Johns Hopkins Applied Physics Lab certainly thought so. Every new picture was introduced with and ooh and an ahh, and then a round of applause.
Nasa’s science chief John Grunsfeld said earlier this week that there was very little terra incognita left in the Solar System. But in Pluto, Charon and its other moons we are seeing virgin territory.
Any analysis at this stage still carries a fair bit of speculation because not all of the complementary data is in. But perhaps the biggest news is the suggestion that some of these bodies are still active, that they are not dull objects that died 4.5 billion years ago.
In the highest resolution image of Pluto, which showed a field of view just 250km across, there were no craters. This is indicative of a young surface, one that may well have experienced recent geological activity.
Image source, NASA-JHUAPL-SwRINow, we’ve seen this kind of thing on moons of giant planets where gravitational tides from the bigger parent can heat up the satellite and deform it. Think of Europa at Jupiter; think of Enceladus at Saturn. But where do you get the heat to drive activity on Pluto? It’s sitting out on its own in the Kuiper Belt with nothing to squeeze it gravitationally. Charon certainly couldn’t do it; it’s too small.
So, what this tells us is that you do not need ongoing tidal heating to power geology on icy worlds. In science terms that’s certainly a big wow.
From a blurry distant object to a close up of Pluto's mountains and other features on the frozen surface
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Word is spreading fast about this newly named formation, five billion km from Earth.
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That finding of recent activity on Pluto's surface, mission chief Alan Stern says, is "going to send a lot of geophysicists back to the drawing boards".
Spencer adds that Pluto has a "very young surface" - i.e. less than 100 million years old - because of the striking lack of impact craters.
It also has mountains that are at least a staggering 11,000 feet tall.
Spencer now unveils the first view from much closer to Pluto's surface.
It shows what he describes as the dwarf planet's "icy bed-rock" - the team has calculated that these mountainous features must be water ice rather than methane or nitrogen.
Image source, NASA"This is the first icy world we've visited that hasn't been orbiting a giant planet," Dr Spencer says.
The other worlds like this have all been moons.
John Spencer, a mission co-investigator from the Southwest Research Institute, announces that the heart-shaped region on Pluto is to be named "Tombaugh Regio" - commemorating the discoverer of the dwarf planet, Clyde Tombaugh.
Now we see Pluto's giant moon Charon!
Image source, NASAQuote MessageThis image just blew our socks off."
Cathy Olkin, Deputy project scientist, New Horizons
The first image to be revealed is of the Pluto's littler moon Hydra.
Project scientist Hal Weaver explains that before New Horizons took this picture, we didn't even know how big this moon was.
Now we can just count the pixels!
Image source, NASAIt's about 45km by 30km, and Weaver said it probably contains water ice.
No images yet - but the mission's principal investigator has started with a masterful understatement.
Quote MessageI had a pretty good day yesterday, how about you?"
Prof Alan Stern
The briefing begins!
Use the Live Coverage tab above to watch.
Our science editor is excited.
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The BBC's Rebecca Morelle has taken her pew for the briefing...
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Dr Cathy Olkin from the Southwest Research Institute was speaking earlier to our science correspondent Jonathan Amos.
This is an exciting time for her and the rest of the team.
Quote MessageThis is all so special. We're learning new things every day.
Quote MessageEvery time the spacecraft communicates with the deep-space network and sends its data down - we learn something new. It's just remarkable to me that all this data is sitting on the spacecraft, just waiting for us to unlock its secrets."
Cathy Olkin, Deputy project scientist, New Horizons
Remember you'll be able to watch the briefing right here on this page.
20 minutes to go!
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