Vikram lander observes temperature variation on lunar surface, records high of 70 degree Celsius
Bengaluru, Aug 27: ISRO on Sunday released a graph of the temperature variation on the lunar surface and a senior scientist of the space agency expressed surprise over the high temperature recorded on the Moon.
The national space agency said Chandra's Surface Thermophysical Experiment (ChaSTE) payload onboard Chandrayaan-3's Vikram lander measured the temperature profile of the lunar topsoil around the pole to understand the thermal behaviour of the Moon's surface.
"Here are the first observations from the ChaSTE payload onboard Vikram Lander. ChaSTE (Chandra's Surface Thermophysical Experiment) measures the temperature profile of the lunar topsoil around the pole to understand the thermal behaviour of the moon's surface," ISRO said in an update on social media platform 'X'.
Speaking about the graphic illustration, ISRO scientist B H M Darukesha told PTI: "We all believed that the temperature could be somewhere around 20 degree centigrade to 30 degree centigrade on the surface but it is 70 degree centigrade. This is surprisingly higher than what we had expected."
The space agency said the payload has a temperature probe equipped with a controlled penetration mechanism capable of reaching a depth of 10 centimetres beneath the surface.
"The probe is fitted with 10 individual temperature sensors. The presented graph illustrates the temperature variations of the lunar surface/near-surface at various depths, as recorded during the probe's penetration. This is the first such profile for the lunar south pole. Detailed observations are underway," ISRO said in a statement.
Scientist Darukesha explained, "When we go two to three centimetres inside the Earth, we hardly see two to three degree centigrade variation whereas there (in Moon), it is about 50 degree centigrade variation. This is something interesting."
The temperature dips to minus 10 degree Celsius below the lunar surface, the senior scientist said, adding that the variation is from 70 degree Celsius to minus 10 degree Celsius.
ISRO said the ChaSTE payload was developed by a team led by the Space Physics Laboratory (SPL) of the space agency's Vikram Sarabhai Space Centre (VSSC) in collaboration with Physical Research Laboratory (PRL), Ahmedabad.
India on August 23 scripted history as ISRO's ambitious third Moon mission Chandrayaan-3 touched down on the lunar surface, making it only the fourth country to accomplish the feat, and first to reach the uncharted south pole of Earth's only natural satellite.
Prime Minister Narendra Modi on Saturday announced that the spot where Chandrayaan-3 Vikram lander touched down would henceforth be called 'Shiv Shakti Point', and the site where the Chandrayaan-2 lander crash-landed on the Moon's surface in 2019 would be known as 'Tiranga Point'.
Besides, August 23 would be celebrated as 'National Space Day' to mark the day when Chandrayaan-3 lander touched down on the lunar surface, Modi said.
Chandrayaan-3 Mission:
— ISRO (@isro) August 27, 2023
Here are the first observations from the ChaSTE payload onboard Vikram Lander.
ChaSTE (Chandra's Surface Thermophysical Experiment) measures the temperature profile of the lunar topsoil around the pole, to understand the thermal behaviour of the moon's… pic.twitter.com/VZ1cjWHTnd
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AAP alleges 'deep-rooted' conspiracy to kill Kejriwal, BJP terms it 'drama'
New Delhi, Oct 26: The AAP on Saturday alleged the BJP was conspiring to "kill" its convener Arvind Kejriwal and had become "an enemy of his life". The ruling party warned that the BJP would be responsible if anything happened to the former chief minister.
Leader of Opposition in the Delhi Assembly Vijender Gupta dismissed the AAP's allegations, saying it was yet another "drama" by the AAP to defame the BJP ahead of the assembly polls.
The AAP had on Friday claimed that Kejriwal, a Z-plus protectee, was attacked by "BJP goons" during his 'padyatra' (foot march) in west Delhi's Vikaspuri, a charge trashed by the saffron party.
However, no video of the alleged attack was made available by the party. Police said they had not received any official complaint from the AAP.
Addressing a press conference on Saturday, AAP MP Sanjay Singh alleged police were complicit in the incident.
"Police complicity in the incident clearly shows a deep-rooted conspiracy to kill Kejriwal. The BJP has become an enemy of his life," he said.
There was no immediate response from police to the Rajya Sabha MP's claim.
Singh said that despite Friday's incident, Kejriwal would carry on with the 'padyatra' as scheduled.
AAP leaders including Kejriwal are undertaking 'padyatras' in different assembly segments of the city in the run-up to the Delhi Assembly polls, likely to be held in February 2025.
Asked why the AAP had not filed a complaint regarding the alleged attack on Kejriwal, Singh said police could take cognisance of the incident and launch a probe.
It would not have happened if police were impartial. Police officers did not do anything to stop the "attackers" who belonged to the BJP's youth wing, he claimed, adding the AAP was seeking legal opinion on the matter.
He also accused BJP leaders of supporting the "attackers".
Singh said Kejriwal would "neither stop nor bow down" and continue to fight for the people of Delhi.
If anything happens to Kejriwal, then the BJP would be responsible for it. Even if Kejriwal suffers a scratch, Delhi's people would take revenge on the BJP, he said.
At another press conference, Delhi cabinet minister Saurabh Bharadwaj claimed one of the attackers was the vice president of the BJP's Delhi Yuva Morcha.
"BJP Yuva Morcha functionaries attacked Kejriwal. One of the attackers is the vice president of BJP Yuva Morcha of Delhi and the second is the general secretary," he said.
The two BJP leaders, who were dancing after attacking Kejriwal, had lost the councillor elections, claimed Bharadwaj.
BJP leader Gupta rubbished the AAP's claims.
"Despite blaming the BJP, no complaint has been filed by the AAP over the alleged attack on Kejriwal, which shows that the party is trying to play the victim card and gain sympathy by trying to defame the BJP before the assembly polls," he said.
The BJP leader said the AAP is worried about the "waning public support" and is attempting to confuse people through such tactics.
The area where Kejriwal was allegedly attacked is not an AAP stronghold and hence, the party "concocted" the story to gain sympathy, Gupta alleged.
