He can remain silent forever with Vikram Lander of the Chandrayaan-2 mission. The lander falls in a part of the moon where cool nights are blowing fast. Temperatures in the region will drop below minus 200 degrees Celsius. This means that even when Vikram survived through the lunar dynasty in September, when it lost contact with the earth, Lander's devices would be frozen from operation on a cool lunar night.
The Indian Space Research Agency has not yet confirmed the current state of Vikram. However, in the past few days, the space company has dropped hints that hopes of reconnecting with six-wheeled wisdom rover owner Vikram Lander have ended.
On Tuesday, ISRO made a secret tweet, thanking everyone for being "on the side" of the space agency and promising to "keep moving forward." Then on Thursday, ISRO suggested an update to the Chandrayaan-2 orbit, noting that the spacecraft was performing well in its orbit around the moon and continued its orbit.
There was a mention of Vikram Lander in the mission update: there was a team of national-level academic and ISOR scientists to investigate why the connection with Chandrayaan-2 lander was broken. Curiously, ISRO chose not to repeat its boilerplate statement that it was making every effort to contact Vikram Lander.
And now, as Vikram has developed where it may go hours before the Moon is fully submerged, perhaps it's time to bid farewell to Lander.
What happened in 7 September.
In early September, Vikram Lander separated from the Chandrayaan-II orbit and began its rise in early September.
Initially it seemed like everything was going well according to plan. Scientists at the ISRO Control Center in Bengaluru were seen cheering and clapping as Vikram dragged on at various stages of his ascent.
About 10 minutes after the 15-minute rise, the pin-drop silence interrupts the ISRO control room. The scientists there apparently looked concerned but had no idea what had happened.
Finally, at 2:18 am, about 40 minutes after the start of Vikram's rise, the ISRO chief went to a microphone at the Ke Sivan Control Center and confirmed that contact with Vikram had been lost.
Try talking to Vikram again
In the days that followed, ISRO's focus was on communicating with Vikram Lander. On September 7, ISRO said that the Chandrayaan-2 orbit placed Vikram on the lunar surface. The contact with the lander was, however, incomplete.
Meanwhile, the US space agency National Aeronautics and Space Administration has provided assistance. NASA activated its deep space network - an array of space antennas around the world - and began transmitting signals to Chandrayaan-2 orbiters and landers. However, when Lander returned the signal, Vikram remained silent.
September 7, NASA's lunar reconnaissance orbiter flew to the landing point of Vikram and photographed the lunar surface. NASA confirmed that the orbiter was capable of taking pictures, but indicated that the images still could not show Vikram.
NASA's Moon Recovery Orbiter tried to take pictures of the area by going over the Vikram landing site.
The fact that NASA has stopped photographing the orbit sharp is the fact that while it is flying over Vikram's landing site, it is evening. Sunlight was fading endlessly, creating long, dark shadows in the rugged terrain and making Vikram difficult to find.
The Chandrayaan-2 mission continues
Meanwhile, the Chandrayaan-2 mission will continue with the reconstructed orbit. The Chandrayaan-2 orbit was originally supposed to operate for a year. However, fuel savings made during the trip to the moon enabled the ISRO Orbiter's mission to extend life by seven years.
During these seven years, the Chandrayaan-2 orbit will undergo several tests. ISRO has confirmed that the orbiter is working well and that all its payloads are powered. Orbiter has already begun testing.
One of the most important experiments that orbiting the orbit is, is to advance the Chandrayaan legacy. On the 21st, the Chandrayaan-1 mission made history by discovering evidence of ice water in the Moon's South Pole. Trying to estimate the amount of ice water in Chandrayaan-2 region, it will carry forward that historical exploration.