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‘Possibility’ Moon lander power can be restored

Japan switched off its Moon lander almost three hours after a historic touchdown to allow for a possible recovery of the craft when the sun hits its solar panels, the country’s space agency has said.

With its unmanned Smart Lander for Investigating Moon (SLIM) mission – dubbed “Moon Sniper” for the craft’s precision landing capabilities – Japan became the fifth country to achieve a soft lunar landing.

However, after the touchdown at 12.20am on Saturday (3.20pm Irish time on Friday), the Japan Aerospace Exploration Agency (JAXA) could not confirm that the lightweight craft’s solar batteries were generating power.

Before turning the lander off remotely, mission control was able to receive technical and image data from its descent, and from the lunar surface.

“We’re relieved and beginning to get excited after confirming a lot of data has been obtained,” JAXA said in a statement, adding that “according to the telemetry data, SLIM’s solar cells are facing west”.

“If sunlight hits the Moon from the west in the future, we believe there’s a possibility of power generation, and we’re currently preparing for restoration,” it said.

SLIM is one of several new lunar missions launched by governments and private firms, 50 years after the first human Moon landing.

Crash landings and communication failures are rife, and only four other countries have made it to the Moon: the US, the Soviet Union, China and most recently India.

JAXA said it had disconnected SLIM’s battery just before 3am on Saturday (6pm Irish time on Friday) when it had 12% power remaining, “in order to avoid a situation where the restart (of the lander) would be hampered”.

Probes detached

The agency is now carrying out a detailed analysis of the data, to help determine whether the craft achieved the goal of arriving within 100m of its intended landing spot.

The mission was aiming for a crater where the Moon’s mantle, the usually deep inner layer beneath its crust, is believed to be exposed on the surface.

By analysing the rocks there, JAXA had hoped to shed light on the mystery of the Moon’s possible water resources – key to building bases there one day as possible stopovers on the way to Mars.

Two probes detached successfully, one with a transmitter and another designed to trundle around the lunar surface beaming images to Earth.

This shape-shifting mini-rover, slightly bigger than a tennis ball, was co-developed by the firm behind the Transformer toys.

JAXA said it was preparing to make further announcements this week on the results of the mission, and the status of the SLIM craft.

Although not everything went to plan, “we may be able to produce plenty of results and we’re happy that the landing succeeded”, it said.

Previous Japanese lunar missions have failed twice – one public and one private.

In 2022, the country unsuccessfully sent a lunar probe named Omotenashi as part of the United States’ Artemis 1 mission.

In April, Japanese startup, ispace, tried in vain to become the first private company to land on the Moon, losing communication with its craft after what it described as a “hard landing”.

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