Artemis II astronauts have regained connection with Earth after travelling behind the Moon - the outage was expected and lasted around 40 minutes
"It is so great to hear from Earth again", says Christina Koch as she broke the silence from the Orion spacecraft
The spacecraft didn't land on the Moon's surface, but looped around its far side and back again - what did they do as they flew by?
While flying behind the Moon, the spacecraft reached its maximum distance from Earth: 252,756 miles (406,771km). The crew had already broken the previous record for the furthest distance humans have travelled from Earth
The crew challenges this generation and the next to make sure their record "is not long-lived"
In an emotional moment, they tell mission control they'd like to name a Moon crater after commander Reid Wiseman's late wife, Carroll
The four astronauts are flying around the Moon and are making lunar observations - why are they going?
Victor Glover, the pilot onboard the Orion spacecraft, has just given a quick insight into what the Artemis crew has been seeing during the eclipse period.
"This is, we just went sci-fi. It just looks unreal," Glover says.
The Artemis II crew are currently observing a solar eclipse, which will go on for the next 35 minutes.
The four astronauts were told to prepare to observe the eclipse by calibrating their cameras' exposure.
They will split into a "window team", and a "cabin team", says Angela Garcia, a science officer for the Artemis mission.
The cabin team supports the window team in their observations by using the onboard cameras and sensors.
Nasa said the astronauts have been provided with a "fleet of cameras" to capture images during their mission, which will include photographs of the solar eclipse.
While flying behind the Moon, the Orion spacecraft reached its maximum distance from Earth - a new record for furthest distance travelled by humans from our home planet.
Nasa says that was 252,756 miles (406,771km).
Earlier today, the Artemis II crew broke the previous record for the furthest distance humans have travelled from Earth - set by Apollo 13 in 1970.
Pallab Ghosh
Science correspondent
Next up, the astronauts will witness a total solar eclipse.
On our planet, total eclipses happen when the Moon's shadow sweeps across a narrow strip of ground, briefly turning day to twilight.
This time the Moon's shadow will not fall on the Earth, but on the Orion spacecraft.
Orion is parked in just the right spot so that the Moon blocks the Sun from the crew's view, revealing the star's pale outer atmosphere – the corona – as a shimmering halo around a darkened lunar disc.
Cameras have been set up at the windows to capture the stages of the event, from the first "bite" out of the Sun to the moment of totality and the delicate "diamond ring" effect as sunlight peeks round the edge.
What makes this sight even more striking is what hangs nearby.
Off to one side, the Earth is still visible - a small, glowing globe, partly in shadow, its cloud systems and continents just about discernible.
Pallab Ghosh
Science correspondent
The astronauts and mission control crew have flipped their patches as the journey back to Earth begins
In a small but carefully choreographed moment, the Artemis II astronauts and mission control teams have "flipped their mission patches" as the journey home begins.
They’ve rotated the special double‑sided emblem so it now shows the Moon in the foreground and Earth rising beyond it – the reverse of how they wore it on the way out.
On launch and during the outbound cruise, the patch was oriented with Earth dominant and the Moon on the horizon, underlining that their target lay ahead.
Now, with the fly-by complete and Orion arcing back towards our planet, the crew have switched to the "homeward" view, a quiet signal that the riskiest part of the voyage is behind them and the priority is getting safely back to Earth.
Mission patches have been part of NASA culture since the Gemini and Apollo days, but this reversible design – deliberately created so it can be flipped mid‑mission – is new with Artemis II rather than a tradition that goes back to the original Moon landings.
It's a tiny detail, but one future crews may choose to copy.
The patches were worn like this on the way to the Moon
Pallab Ghosh
Science correspondent
Astronauts have been studying "impact flashes".
These are the tiny, split-second bursts of light when small space rocks slam into the Moon fast enough to vaporise themselves and a patch of lunar surface.
The astronauts now have a one-hour observation break.
That’s a chance to rest their brains from checklists while still doing useful observing on the darkened Moon.
Coming up in an hour or so – a total solar eclipse, which should be a mind-blowing moment for the crew.
The first words are now back from Integrity.
"Houston, Integrity, comms check," were the first words from mission specialist Christina Koch, after a tense 40 minutes of radio silence while the crew was on the far side of the Moon.
"It is so great to hear the Earth again," she says.
She then addresses the residents of Asia, Africa and Oceania.
"We are looking back at you. We hear you can look up and see the Moon right now. We see you, too," Koch says.
Houston responds: "Integrity from Earth. Our single system, fragile and interconnected, we copy. Those of us that can, are looking back."
A few minutes later, mission control adds: "You are Earthbound, and we're ready to bring you home."
Pallab Ghosh
Science correspondent
Right on schedule, Orion has reappeared from behind the Moon and checked back in with Earth.
First came the reassuring return of the radio signal on engineers' monitors, then a burst of data, and finally a clear voice from the capsule. The words were unremarkable - the relief in Mission Control was not.
"Houston, Integrity, comm check," mission specialist Christina Koch said as she broke the silence from Orion.
"It is so great to hear from Earth again."
During the 40 minutes of radio silence, the spacecraft had to look after itself.
Its onboard computers carried out a key engine burn on the far side – unseen and unheard from Earth – to bend Orion onto its return arc.
In human spaceflight there is always a tiny edge of uncertainty until you hear the crew again.
Families watching from the viewing gallery have spent the blackout poring over briefing notes, trying not to watch the clock.
Now that contact is restored, the data backlog will pour in.
Stored telemetry and images from the far side will be relayed through NASA’s Deep Space Network, ready for engineers and scientists to comb through in the coming days.
Early thumbnails hint at some of the most detailed views yet of the Moon’s hidden hemisphere.
For the crew, there is little time to savour the moment.
Rebecca Morelle
Science editor
We’ve been chatting to Nasa's science team and asking them what they're most looking forward to from the fly-by.
While they're definitely very excited to see the images the astronauts take, it's actually the audio that they really can't wait to hear.
As the astronauts fly around the far side of the Moon and train their eyes on the lunar landscape, they'll be saying what they see out loud and recording it into their tablets.
And these descriptions will be beamed back to Earth, so you can listen along at home.
"I just can't wait to hear how excited they are when they're actually looking at the Moon from close up," Dr Nicola Fox, Nasa’s Head of Science tells the BBC.
"So that's going to be the moment that's going to make me probably burst into tears."
Pallab Ghosh
Science correspondent
Scientists say this close pass will let Orion’s crew study the Moon as if they were doing a low‑altitude aerial survey, without ever touching down.
As they skim some 9,000 kilometres above the surface, the astronauts will be asked to "read the rocks" – picking out craters, cliffs and frozen lava flows, then photographing them in ultra‑high detail.
Those images, plus laser and camera data from Orion itself, should sharpen maps of the lunar surface and help geologists piece together how the Moon's crust was built and battered over billions of years.
Researchers are especially keen on views of the polar regions, where later missions hope to land near suspected deposits of water ice.
By watching how sunlight and shadow play across those pitted landscapes in real time, the crew can give planners a much better feel for which slopes look treacherous, which flat plains might take a lander, and where future astronauts should go hunting for resources.
Scientists will also be watching for any telltale glow from "lofted lunar dust", kicked up by sunlight and electrostatic forces, to understand how gritty particles move above the Moon’s surface.
Rebecca Morelle
Science editor
Image source, NASAThis is the last view from the Artemis II spacecraft, seen on the left of the photo, in the moments before connection was lost with the Earth - the small crescent on the right.
That silence is expected to last 40 minutes.
Throughout their epic journey, the astronauts' contact with mission control has been a constant link with home.
But now that link is lost, as the signal from the spacecraft is blocked by the Moon itself.
The 40 minutes without contact will be tense here at mission control. But for the four astronauts - so very far away from home - it will be just them and the Moon.
Pallab Ghosh
Science correspondent
Orion should be at its closest pass to the Moon – a sweeping fly-by that brought the spacecraft to within a few thousand miles of the surface. At that distance, the Moon fills the screen, with craters and mountain chains sliding past in slow, stately motion.
As well as taking vital scientific imagery, this part of the mission is also about grabbing gravity and using its force to hurl the astronauts back home, as if using the Moon like a slingshot.
The crew will be busy. Their cameras will be picking out features that lunar geologists back on Earth are desperate to scrutinise – fresh craters, ancient lava plains and scarps where the Moon’s crust has buckled.
The crew has also been asked to make quick pencil sketches and voice notes, capturing details that even the sharpest images can miss. It’s the kind of observational work that is normally done by astronomers on a mountaintop observatory.
Tonight, it is happening from a capsule sweeping round another world.
Pallab Ghosh
Science correspondent
Pilot Victor Glover's message just before loss of signal has echoes of the reading from the Book of Genesis from the Apollo 8 crew on Christmas Eve in 1968.
"In the beginning God created the heaven and the Earth. And the Earth was without form, and void; and darkness was upon the face of the deep."
Words that were all the more profound for those able to watch on TV, seeing live black-and-white images of the Moon and of the distant Earth as seen from their spacecraft
Command module pilot James (Jim) Lovell then took up the next verse followed by the commander, Frank Borman who signed off, with another iconic moment.
"And from the crew of Apollo 8, we close with good night, good luck, a Merry Christmas – and God bless all of you, all of you on the good Earth," followed by a crackle and long bleep, to punctuate this historic moment in human history.
Canadian astronaut Jeremy Hansen sent a message to family members in the Nasa viewing gallery, including his wife Catherine and his son Devon.
"I just wanted to let them know how much fun we're having out here," he says.
"It's extraordinary to be on the far side of the moon right now. Just see it hanging out there looking back at the Earth.
"Just wanted to say hi to all you guys, love you guys and we'll be heading back your way shortly."
Pallab Ghosh
Science correspondent
Orion has just slipped behind the bulk of the Moon and out of radio contact with Earth.
Engineers have always known this moment was coming – part of the flight plan – but when the signal drops, it's still a tense moment.
Right now, four astronauts are arcing round the far side of the Moon, further from home and more cut off than any humans have been for more than 50 years. There will be no comforting murmur for them from Mission Control, just the faint hum of fans and electronics as Orion follows its pre‑programmed path.
Outside the window, they are seeing landscapes we have only ever mapped with robots – steep‑walled craters, mountains thrown up by ancient impacts, and highlands pummelled by billions of years of debris.
For the next several minutes or so there is nothing anyone on Earth can do but wait. The spacecraft’s computers will handle the crucial engine burn that bends Orion onto its long loop home.
If everything goes to plan, the first sign that all is well will be a simple one: the signal returning followed by a cheery voice of one of the astronauts.
Houston begins speaking again and says it is a privilege to watch the astronauts.
Thank you to all of you for allowing us to be on this immense journey together pilot Victor Glover says.
"To all of you down there, we love you from the Moon," Glover speaks briefly about what he calls the most important mystery on earth "love".
Glover and the other astronauts will be out of communication for 40 minutes.
"Houston copies, we'll see you on the other side," Leah Cheshier Mustachio from NASA communications tells the astronauts.
Glover replies: "We will see you on the other side." Then there's just silence, as we all eagerly await to hear from the astronauts again.
Alison Francis
Senior science journalist
As the astronauts pass behind our celestial neighbour, the radio and laser signals that allow communication between the spacecraft and Earth, will be blocked by the Moon itself.
For about 40 minutes, the four astronauts will be totally alone.
They’ll spend the blackout dedicated to lunar observation – taking images, studying the Moon’s geology and simply gazing at its bleak beauty.
When they emerge and the signal is re-established, the world is expected to breathe a collective sigh of relief.
And the history-making astronauts will be able to share their incredible views with everyone back home.
Tara Mewawalla
Live reporter
When the crew woke up today, they listened to a special message recorded by Apollo 13 Commander Jim Lovell shortly before his death last year. "I'm proud to pass [this] torch on to you," he told them.
The Integrity spacecraft had already entered the lunar sphere of influence, meaning the pull of the Moon's gravity is stronger than that of the Earth.
The Artemis II astronauts set a new record for the furthest distance humans have ever travelled away from the Earth.
The record was previously held by the Apollo 13 crew, who travelled 248,655 miles from Earth in 1970. Artemis II will beat this record by about 4,102 miles, reaching a maximum distance of 252,757 miles at around 18:07 central time (22:07 GMT).
The crew named one of the Moon's craters after Commander Reid Wiseman's late wife Carroll, who died of cancer in 2020. They name another crater Integrity - after the Orion spacecraft which has carried them to the far side of the Moon.
The lunar observation period has begun and will last for around seven hours. Wiseman described his view of the earth as a "small crescent", while mission specialist Christina Koch told mission control she had an "overwhelming sense of being moved by the Moon".
In the coming hours, mission control is expecting Artemis II to temporarily lose communication with the crew as the Orion spacecraft passes behind the Moon.
Artemis II pilot and Nasa astronaut Victor Glover hears that his family is in the viewing gallery, listening to him give his "sit-rep" (situational report) to mission control.
When he is told Dionna Glover, his wife, is "all smiles", he replies: "Hey babe, I love you from the Moon... I'm glad you get to be there."
Mission specialist Christina Koch describes to mission control her lunar observation as an "incredible experience".
"At one point... I just had an overwhelming sense of being moved by looking at the Moon", she says.
She says this lasted "just a second or two" as something "drew me in suddenly into the landscape and it became real".
"The moon really is its own body in the Universe. It's not just a poster in the sky that goes by. It is a real place and when we have that perspective and we compare it to our home of the Earth it just reminds us how much we have in common.
"Everything we need the Earth provides and that is in and of itself truly a miracle."
