Scientists find water on sunlit surface of Moon
Washington: Scientists have confirmed, for the first time, the presence of water on the sunlit surface of the Moon, a discovery which indicates that water molecules may be distributed across the lunar surface, and not limited to the cold, shadowed places as previously thought.
Using NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA), the researchers, including those from the University of Hawaii in the US, detected water molecules (H2O) in Clavius Crater -- one of the largest craters visible from the Earth, located in the Moon's southern hemisphere.
While earlier studies of the Moon's surface, including those conducted during the Indian Space Research Organisation's (ISRO) Chandrayaan-1 mission, detected some form of hydrogen, the NASA scientists said these were unable to distinguish between water and its close chemical relative, hydroxyl (OH).
Data from the current study, published in the journal Nature Astronomy, revealed that the Clavius Crater region has water in concentrations of 100 to 412 parts per million -- roughly equivalent to a 12-ounce bottle of water -- trapped in a cubic meter of soil spread across the lunar surface.
As a comparison, the researchers said the Sahara desert has 100 times the amount of water than what SOFIA detected in the lunar soil.
"Prior to the SOFIA observations, we knew there was some kind of hydration. But we didn't know how much, if any, was actually water molecules -- like we drink every day -- or something more like drain cleaner," said Casey Honniball, the lead author of the study from the University of Hawaii.
Despite the small amounts, they said the discovery raises new questions about how water is created and how it persists on the harsh, airless lunar surface.
"We had indications that H2O -- the familiar water we know -- might be present on the sunlit side of the Moon. Now we know it is there. This discovery challenges our understanding of the lunar surface and raises intriguing questions about resources relevant for deep space exploration," said Paul Hertz, director of the Astrophysics Division in the Science Mission Directorate at NASA Headquarters in Washington.
Whether the water SOFIA found is easily accessible for use as a resource remains to be determined, the researchers added. According to the scientists, SOFIA offered a new means of looking at the Moon, flying at altitudes of up to 45,000 feet.
They said the modified Boeing 747SP jetliner with a 106-inch diameter telescope reaches above 99 per cent of the water vapor in the Earth's atmosphere to get a clearer view of radiation from the universe in the infrared wavelength.
Using its Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST), the researchers said SOFIA was able to pick up the specific wavelength unique to water molecules and discovered a relatively surprising concentration in the sunny Clavius Crater.
"Without a thick atmosphere, water on the sunlit lunar surface should just be lost to space. Yet somehow we're seeing it. Something is generating the water, and something must be trapping it there," Honniball said.
The scientists believe several forces could be at play in the delivery or creation of this water.
One possibility they said could be from micrometeorites raining down on the lunar surface, carrying small amounts of water, which may deposit the water on the lunar surface upon impact.
The researchers hypothesised that there may also be a two-step process whereby the Sun's solar wind delivers hydrogen to the lunar surface and causes a chemical reaction with oxygen-bearing minerals in the soil to create hydroxyl.
Meanwhile, they said radiation from the bombardment of micrometeorites could be transforming that hydroxyl into water.
Commenting on how the water was stored on the lunar surface, the scientists noted that the water could be trapped into tiny beadlike structures in the soil that form out of the high heat created by micrometeorite impacts.
Another possibility is that the water could be hidden between grains of lunar soil and sheltered from the sunlight --potentially making it a bit more accessible than water trapped in beadlike structures, they noted in a statement.
"It was, in fact, the first time SOFIA has looked at the Moon, and we weren't even completely sure if we would get reliable data, but questions about the Moon's water compelled us to try," said Naseem Rangwala, SOFIA's project scientist at NASA's Ames Research Center in the US.
"It's incredible that this discovery came out of what was essentially a test, and now that we know we can do this, we're planning more flights to do more observations," Rangwala added.
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Rishabh Pant's troubles continue as Punjab Kings push LSG towards exit door
Dharamsala, May 4 (PTI): Rishabh Pant lost the grip on his bat and the match simultaneously as Punjab Kings rode on heroics from the two 'Singhs' -- Prabhsimran and Arshdeep -- to literally push Lucknow Super Giants to the brink of elimination with a 37-run win in an IPL match here on Sunday.
It was Prabhsimran's 48-ball 91 that formed the cornerstone of Punjab Kings' unassailable 236 for 5 and any hopes of a remarkable chase was nipped in the bud by Arshdeep's (3/16 in 4 overs) now familiar Powerplay spell which summarily destroyed the opposition top-order.
This time, he got the three top run getters -- Mitchell Marsh (0), Aiden Markram (13) and the ever-dangerous Nicholas Pooran (6) -- to swing the match decisively in Punjab's favour. Ayush Badoni's (74 off 40 balls) effort was a good one albeit it came for a losing cause.
LSG were finally restricted to 199 for 7 in 20 overs and even if they win their last three games and get to 16 points from 14 games, their net run-rate can make things difficult for them.
Punjab Kings are now placed second with 15 points from 11 games and one more win could possibly clinch a place in top four for them.
But what is becoming an eyesore is LSG's Rs 27 crore worth skipper Pant's inexplicable approach which has fetched him a dismal 128 runs in 11 innings at a sub-100 strike-rate (99.22).
On the day, he scored 18 off 17 balls and that he is completely out of sync was evident in the manner he tried to throw the proverbial kitchen sink at an Azmatullah Omarzai delivery. There was no control in his shot as the bat took off on parabolic curve towards square leg and the ball went towards deep point.
Pant's misery was a testimony of LSG's wretched campaign that was lost at the auction table when the owner decided to go with a sub-standard bowling attack based on a half-fit talented pacer Mayank Yadav.
Mayank has already lost at least 10-15 yards of pace post rehabilitation under the watch of Nitin Patel at the National Cricket Academy.
On Sunday, he went for 60 runs off four overs with half a dozen of sixes struck off his bowling.
The pint-sized Prabhsimran packed a mean punch in his strokes as he blasted his way to a 48-ball 91 with the help of six fours and seven sixes.
The Punjab keeper-batter should have got his second IPL hundred but an ambitious switch hit off Digvesh Rathi saw him head back to the pavilion, nine runs short of what would have been a deserving milestone.
Towards the end, Shashank Singh scored 33 off 15 balls to take PBKS to what looked like an unassailable total. There were 16 sixes hit by Pujab Kings with 13 coming off pacers.
Prabhsimran was initially a passive partner as it was Australian Jos Inglis who launched the first attack with a hat-trick of sixes off Mayank Yadav, whose speed has decreased by at least 15 kmph post his intense rehab under Nitin Patel at the BCCI's erstwhile National Cricket Academy to recover from back injury.
However, once Inglis was dismissed, Prabhsimran, along with skipper Shreyas Iyer (45 off 25 balls), took control of the game. They were only helped by some atrocious fielding from Avesh Khan, who would probably go down as the worst fielder in the 18-year history of IPL.
Adding insult to injury, Prabhsimran took the tall MP fast bowler to the cleaners as he was pulled over mid-wicket for back-to-back maximums. Khan went for 57 in four overs and if around 15 runs due to his misfielding is added, he caused the maximum damage for his team.
The duo of Prabhsimran and Iyer added 78 runs in 7.5 overs before Rathi, LSG's best bowler on view, became the first spinner in the current season to account for Punjab Kings skipper's wicket.
But Prabhsimran continued like a man possessed and LSG bowlers were guilty of feeding to his strengths throughout the innings.
