Russia's first Moon mission in 50 years has failed after its Luna-25 landing module crashed on the lunar surface.
The country's space agency Roscosmos said on Sunday that it had not received a signal from the lander.
It was scheduled to make a landing attempt on Monday at the lunar south pole, a region that has not been explored previously.
There was a problem with a manoeuvre carried out on Saturday, Roscosmos said.
“At about 14.57 Moscow time, communication with the Luna-25 was interrupted,” it said on Telegram.
“The measures taken on August 19 and 20 to search for the device and get into contact with it did not produce any results.
“According to the results of the preliminary analysis, due to the deviation of the actual parameters of the trajectory from the calculated ones, the device switched to an off-design orbit and ceased to exist as a result of a collision with the lunar surface.”
Roscosmos said further investigations would be carried out to determine the cause of the crash.
India's Chandrayaan-3 mission is going as planned, with the country's Vikram craft expected to attempt a soft landing on the Moon on August 23.
Only the US, the Soviet Union and China have carried out a soft lunar landing.
The manoeuvre has a success rate of less than a 50 per cent.
Because the Moon does not have an atmosphere, parachutes cannot be used to slow landers down during a landing attempt, as they are on Earth and Mars.
Instead, landers use propulsion systems to brake and adjust position to touch down gently.
Technical problems and the lunar terrain, including craters and rocks, can also pose challenges for space agencies.
Israel's attempted lunar landing in 2019 failed because of a technical glitch.
Japanese company ispace reported an unsuccessful Moon mission this year when its Hakuto-R lander, which was carrying the UAE's Rashid rover, crashed on the lunar surface.
The company blamed a software issue.
T20 World Cup Qualifier fixtures
Tuesday, October 29
Qualifier one, 2.10pm – Netherlands v UAE
Qualifier two, 7.30pm – Namibia v Oman
Wednesday, October 30
Qualifier three, 2.10pm – Scotland v loser of qualifier one
Qualifier four, 7.30pm – Hong Kong v loser of qualifier two
Thursday, October 31
Fifth-place playoff, 2.10pm – winner of qualifier three v winner of qualifier four
Friday, November 1
Semi-final one, 2.10pm – Ireland v winner of qualifier one
Semi-final two, 7.30pm – PNG v winner of qualifier two
Saturday, November 2
Third-place playoff, 2.10pm
Final, 7.30pm
ELIO
Starring: Yonas Kibreab, Zoe Saldana, Brad Garrett
Directors: Madeline Sharafian, Domee Shi, Adrian Molina
Rating: 4/5
Water waste
In the UAE’s arid climate, small shrubs, bushes and flower beds usually require about six litres of water per square metre, daily. That increases to 12 litres per square metre a day for small trees, and 300 litres for palm trees.
Horticulturists suggest the best time for watering is before 8am or after 6pm, when water won't be dried up by the sun.
A global report published by the Water Resources Institute in August, ranked the UAE 10th out of 164 nations where water supplies are most stretched.
The Emirates is the world’s third largest per capita water consumer after the US and Canada.
Benefits of first-time home buyers' scheme
- Priority access to new homes from participating developers
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'My Son'
Director: Christian Carion
Starring: James McAvoy, Claire Foy, Tom Cullen, Gary Lewis
Rating: 2/5
How does ToTok work?
The calling app is available to download on Google Play and Apple App Store
To successfully install ToTok, users are asked to enter their phone number and then create a nickname.
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Users can also invite other contacts to download ToTok to allow them to make contact through the app.
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