The moon could get its own time zone, but clocks work differently there – here’s why
Most of us have at some point stopped to gaze up at the moon – but have you ever wondered what time it is up there?
For those who have, their question may soon have an answer, as space organisations are considering giving the moon its very own time zone.
Dozens of lunar missions, including ones to build bases and other habitats on the moon, are planned for the decade ahead, the European Space Agency (ESA) has said.
Space organisations began discussions about lunar time-keeping at the ESA’s ESTEC technology centre in the Netherlands in November 2022.
ESA navigation system engineer Pietro Giordano said: “We agreed on the importance and urgency of defining a common lunar reference time, which is internationally accepted and towards which all lunar systems and users may refer to.
“A joint international effort is now being launched towards achieving this.”
Up until now, each new mission to the moon has been operated on its own timescale, with deep space antennas used to keep onboard chronometers synchronised with the time on Earth.
Beyond astronauts and ground controllers being able to tell the time on the moon, the need for standard time-keeping in space is also essential for guidance and navigation.
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Just as GPS systems on Earth require precise coordination and timing, so too will any infrastructure that is built and operated on the moon.
NASA’s Gateway station will serve as a multi-purpose outpost orbiting the moon when it begins operating sometime after November 2024.
It will be open to astronaut stays and provide support for humans to return to the moon’s surface.
Meanwhile, the ESA will be putting down its own Argonaut lander on the moon.
These missions will not only be operating on or around the moon at the same time – they will also be interacting and potentially relaying communications for one another and performing joint observations.
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The ESA has said that among the current topics under debate is whether a single organisation should be responsible for setting and maintaining lunar time, and whether it should be set on an independent basis or be kept synchronised with Earth.
The international team working on the subject will face “considerable technical issues”, the ESA has said.
Why do clocks work differently on the moon?
One challenge is that clocks on the moon run faster than their equivalents on Earth, as clocks tick slower in stronger gravitational fields, therefore gaining around 56 microseconds or millionths of a second per day.
Their exact rate depends on their position on the moon, ticking at a different speed on the lunar surface than when they are in orbit.
Bernhard Hufenbach, a member of the Moonlight Management Team from ESA’s Directorate of Human and Robotic Exploration, said: “Of course, the agreed time system will also have to be practical for astronauts.
“This will be quite a challenge on a planetary surface where in the equatorial region each day is 29.5 days long, including freezing fortnight-long lunar nights, with the whole of Earth just a small blue circle in the dark sky.
“But having established a working time system for the moon, we can go on to do the same for other planetary destinations.”
Pakistan has launched attacks on “multiple targets” across India, according to the media wing of Pakistan’s military.
Pakistan said in a statement that retaliatory attacks are underway in response to what it called “continuous provocation” by India, which fired missiles at three air bases inside Pakistan.
“Multiple targets in this operation are being engaged all across India,” the statement from Pakistan Armed Forces (PAF) said.
Pakistan’s military said it used medium-range Fateh missiles to strike more than 25 military sites, including airbases and weapons depots in the Indian states of Gujarat, Punjab and Rajasthan, as well as locations in India-administered Kashmir.
Pakistan’s military posted footage on X showing missiles being fired from what appeared to be a mobile launcher.
Pic: MilitaryPakISPR
The AP news agency also said loud explosions have been heard in India-administered Kashmir, in the disputed region’s two big cities of Srinagar and Jammu, and the garrison town of Udhampur.
Meanwhile, an Indian military source told Reuters that India has launched air operations in Pakistan, although no further details were given.
The operations mark the latest escalation in a conflict between the two nuclear-armed rivals, triggered by a deadly attack last month in India-administered Kashmir.
Most of the 26 civilians killed were Hindu Indian tourists. India blames Pakistan for backing the assault, an accusation Islamabad rejects.
Pakistan’s Prime Minister Shehbaz Sharif has called a meeting of the National Command Authority, the body which takes security decisions, including those related to the country’s nuclear arsenal.
State-run Pakistan television said three air bases were struck by India on Friday, although Pakistan insisted most of the missiles had been intercepted.
Despite the military offensive, PAF also posted a message on X in what appeared to represent an opportunity to de-escalate the situation.
“Now that a response has been given we hope the neighbour [India] will move to dialogue and diplomacy like Civilized Nations,” it said.
In recent days, both countries have launched a series of missile and drone strikes, although the scale and impact have been consistently questioned by each other.
On Wednesday, India conducted airstrikes on several sites in Pakistani territory. Pakistan said it shot down five Indian fighter jets.
On Thursday, India claimed to have repelled drone and missile attacks at military targets in more than a dozen cities and towns, including Jammu in India-administered Kashmir. Meanwhile, India claimed it struck Pakistan’s air defence systems and radars close to the city of Lahore.
A damaged house in Jammu, in Indian-administered Kashmir, after a Pakistani drone attack. Pic: AP
The Indian army said on Friday that Pakistan fired about 300 to 400 drones, targeting military installations along the western borders – a claim strongly denied by Pakistan.
The G7 group of advanced economies, which includes Canada, France, Germany, Italy, Japan, the US and Britain, urged maximum restraint from both India and Pakistan.
“We call for immediate de-escalation and encourage both countries to engage in direct dialogue towards a peaceful outcome,” a statement issued on Friday said.
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World
European leaders to meet in Ukraine for ‘coalition of the willing’ talks – and issue call to Russia
Sir Keir Starmer will join other European leaders in Kyiv on Saturday for talks on the “coalition of the willing”.
The prime minister is attending the event alongside French President Emmanuel Macron, recently-elected German Chancellor Friedrich Merz and Polish Prime Minister Donald Tusk.
It will be the first time the leaders of the four countries will travel to Ukraine at the same time – on board a train to Kyiv – with their meeting hosted by President Volodymyr Zelenskyy.
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Sir Keir Starmer, Emmanuel Macron and Friedrich Merz travelling in the saloon car of a special train to Kiev. Pic: Reuters
Military officers from around 30 countries have been involved in drawing up plans for the coalition, which would provide a peacekeeping force in the event of a ceasefire being agreed between Russia and Ukraine.
Ahead of the meeting on Saturday, Sir Keir, Mr Macron, Mr Tusk and Mr Merz released a joint statement voicing support for Ukraine and calling on Russia to agree to a 30-day ceasefire.
Sir Keir and Volodymyr Zelenskyy during a meeting in March. Pic: AP
“We reiterate our backing for President Trump’s calls for a peace deal and call on Russia to stop obstructing efforts to secure an enduring peace,” they said.
“Alongside the US, we call on Russia to agree a full and unconditional 30-day ceasefire to create the space for talks on a just and lasting peace.”
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The leaders said they were “ready to support peace talks as soon as possible”.
But they warned that they would continue to “ratchet up pressure on Russia’s war machine” until Moscow agrees to a lasting ceasefire.
“We are clear the bloodshed must end, Russia must stop its illegal invasion, and Ukraine must be able to prosper as a safe, secure and sovereign nation within its internationally recognised borders for generations to come,” their statement added.
“We will continue to increase our support for Ukraine.”
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The European leaders are set to visit the Maidan, a central square in Ukraine’s capital where flags represent those who died in the war.
They are also expected to host a virtual meeting for other leaders in the “coalition of the willing” to update them on progress towards a peacekeeping force.
This force “would help regenerate Ukraine’s armed forces after any peace deal and strengthen confidence in any future peace”, according to Number 10.
World
Ten explosions near international airport in India-administered part of Kashmir, officials say
Ten explosions have been heard near Srinagar International Airport in India-administered parts of Kashmir, officials have told Reuters news agency.
The blasts followed blackouts caused by multiple projectiles, which were seen in the sky above the city of Jammu earlier on Friday.
Explosions were also heard in the Sikh holy city of Amritsar, in the neighbouring Punjab state, according to Reuters.
An Indian military official told the agency that “drones have been sighted” and “they are being engaged”.
It comes as tensions between India and Pakistan across the line of control around the region of Kashmir have boiled over this week, leading to fears of a wider conflict.
On Wednesday morning, India carried out missile strikes in Pakistan and Pakistan-administered parts of the disputed region.
The retaliation came weeks after 26 people, mainly Indian tourists, were shot dead by gunmen in an India-administered part of Kashmir last month.
The government in India said it hit nine “terrorist infrastructure” sites, while Pakistan said it was not involved in the April attack and the sites were not militant bases.
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Explained: India-Pakistan conflict
Around 48 people have been killed since Wednesday, according to casualty estimates on both sides – which have not been independently verified.
India also suspended its top cricket tournament, the Indian Premier League, as a result of rising tensions, while the Pakistan Super League moved the remainder of its season to the United Arab Emirates.
Meanwhile, White House press secretary Karoline Leavitt said at a conference on Friday that the US is in constant contact with both India and Pakistan.
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