Trump continues and says: "Humans have really never seen anything quite like what you're doing."

"It's really special."

He then congratulates each crew member of the Artemis crew and the entire team at Nasa.

US President Donald Trump is speaking directly to the crew aboard Artemis II in a surprise appearance.

"Today, you've made history and made all America really proud, incredibly proud," he tells the four astronauts.

"We have a lot of things to be proud of lately, but this is... there's nothing like what you're doing, circling around the moon for the first time in more than a half century, and breaking the all time record for the farthest distance from planet Earth."

Image source, NASA

The Nasa science crew has just signed off, thanking the Artemis II crew for their observations.

Mission control says the solar eclipse observation period has closed, and the team aboard the Orion spacecraft will now begin "down-linking" all of the images and data they have captured over the past seven hours of observation.

Artemis II pilot Victor Glover has just told the crew on the ground that what the four astronauts are currently seeing is "truly hard to describe".

"I know this observation won't be of any scientific value but I'm really glad we launched on April 1st, because humans have probably not evolved to see what we are seeing," he tells them.

Commander Reid Wiseman jumped in with his observations:

"It's just indescribable. No matter how long we look at this, our brains are not processing this image in front of us. It is absolutely spectacular, surreal... there's no adjectives, I'm going to need to invent some new ones, there's absolutely no words to describe what we are looking at out this window."

As Glover described something he said was orange, the crew on the ground said the reddish object was likely Mars.

"Good opportunity to look to the future of where we're going," mission control tells the four aboard the Orion spacecraft.

The crew joked they wanted 20 new superlatives added to the mission summary tomorrow, to assist with their descriptions.

Earlier we heard Nasa astronaut Victor Glover describe what he was seeing during the solar eclipse period as "sci-fi" and "unreal". He also described the view of the corona of the sun.

Here is what he said:

"This continues to be unreal.

The Sun has gone behind the Moon and the corona is still visible, and it's bright and creates a halo almost around the entire moon.

But when you get to the Earth side, it's the Earth shine that's already shown.

I mean almost seconds after the Sun set behind the Moon, you could see Earth shine.

The Earth is so bright out there and the Moon is just hanging in front of us.

This black orb out in front of us now, not the blackness but the grey that blends and drifts into the blackness. We can see stars and planets behind it.

Christina is in window one, Reid is in window two with the long lens and Jeremy is describing it in window three.

It is quite an impressive sight.

You can still see the horizon with a brighter... where the sun set on that side of the Moon. And the Earth shine is very distinct and it creates quite an impressive visual illusion.

Wow it's amazing."

As a reminder, there are four astronauts aboard the Orion spacecraft that make up the Artemis II crew.

It includes three Nasa astronauts - Commander Reid Wiseman, Victor Glover and Christina Koch - along with Jeremy Hansen of the Canadian Space Agency.

For those following the mission via the Nasa livestream, you will regularly hear the astronauts recording their observations and communicating with the crew on the ground.

You can read more on the four astronauts and their stories here.

Image source, Reuters

Nasa mission control says they have been experiencing a "forward link loss of signal", which means that for a brief and expected period, the ground crew was unable to speak to the astronauts aboard the Orion spacecraft.

However, mission control says that the astronauts' observations of what they were seeing were still able to reach the ground crew - and the waiting science team on Earth.

After about five minutes, signal returned.

Just minutes ago, Artemis mission control confirmed that a tiny dot seen during the live broadcast from Nasa was Venus.

"You are currently seeing a live view of the solar array wing of the Orion spacecraft", the mission control member said.

"We spoke with our science team, and they did determine that that dot in the distance is Venus."

Venus is the second planet from the Sun, and the sixth largest planet in our solar system.

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

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.

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, NASA

This 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.