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Earth’s Moon and Mercury, the closest planet to the Sun, may have far more water ice than previously thought, new evidence suggests.
“If confirmed, this potential reservoir of frozen water on the Moon may be sufficiently massive to sustain long-term lunar exploration,” said Noah Petro, Lunar Reconnaissance Orbiter Project Scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
The potential ice deposits are found in craters near the poles of both Moon and Mercury, said the study published in the journal Nature Geoscience.
“We found shallow craters tend to be located in areas where surface ice was previously detected near the south pole of the Moon, and inferred this shallowing is most likely due to the presence of buried thick ice deposits,” said lead author Lior Rubanenko of the University of California, Los Angeles.
In the past, telescopic observations and orbiting spacecraft have found glacier-like ice deposits on Mercury, but as of yet not on the Moon.
The new work raises the possibility that thick ice-rich deposits also exist on the Moon.
The research may not only help resolve the question regarding the Moon’s apparent low ice abundance relative to Mercury, but it could also have practical applications.
The poles of Mercury and the Moon are among the coldest places in our solar system. Unlike Earth, the spin axes of Mercury and the Moon are oriented such that, in their polar regions, the Sun never rises high above the horizon.
Consequently, polar topographic depressions, such as impact craters, never see the Sun. For decades it has been postulated these so-called permanently shadowed regions are so cold that any ice trapped within them can potentially survive for billions of years.
Previous observations of the poles of Mercury with Earth-based radar revealed a signature characteristic of thick, pure ice deposits. Later, NASA’s MESSENGER – the Mercury Surface, Space Environment, Geochemistry and Ranging spacecraft – imaged these ice deposits.
Previous radar and imaging studies of the Moon, whose polar thermal environments are very similar to those of Mercury, found only patchy, shallow ice deposits.
The study used elevation data obtained by MESSENGER and NASA’s Lunar Reconnaissance Orbiter (LRO) to measure approximately 15,000 simple craters with diameters ranging from 2.5 km to 15 km on Mercury and the Moon.
Indian Space Research Organisation (ISRO) on July 22 launched the Chandrayaan-2 Moon mission in order to explore the topography of the Moon and its composition and will search for water besides conducting in-situ studies.
The Chandrayaan-1 mission found evidence of water on the Moon. (IANS)
Super model and actress Hailey Bieber said she is lucky to have a husband like Justin Bieber, refuting rumours of the ace singer not treating her properly. Hailey was speaking at singer Demi Lovato's podcast '4D With Demi Lovato', dailymail.co.uk reported.
Talking about her popstar husband and rumours around their marriage, Hailey said: "I think one of the biggest things is you have to know what the truth is behind everything. You know, there's so many narratives that float around about me, about him, about us together." She addressed the rumours point blank as she said: "There's one big fat narrative that goes around that's like, 'Justin is not nice to her, and that he mistreats her', and I'm just like, it's so far from the truth, and it's the complete and utter opposite."
Hailey went on to set the record straight about Justin, who she married in 2018. She said: "I really am lucky to say I'm with someone who is extremely respectful of me, who makes me feel special every single day. So when I see the opposite of that, I'm just like, 'Huh?' And everybody around who knows us personally would say the same thing." (IANS/ MBI)
Keywords: Hailey Bieber, Justin Bieber, husband, respectful, truth, married
Among the Tamil epics written during the Sangam age, only a few survived to this day. Manimegalai is one such. It is written as a sequel to the Sillapadikaram, taking the story forward of Kovalan and Madhavi's daughter, Manimegalai. The Sillapadikaram is about the injustice of the Madurai kingdom in the execution of Kovalan, which turned Kannagi, his wife into a goddess seeking vengeance for her husband's death. Kovalan, before his death, has an affair with a court dancer, Madhavi, and his daughter, Manimegalai, is said to begin a different tradition among the Tamils.
The epic, written by Sattanar, introduces Buddhism to Dravidian culture, something that has been alien to them for years. Manimegalai is the protagonist, who flees constantly from the pursuit of Chola prince Udhayakumara, and tries to lead an ascetic life. Throughout the plot, Buddhist tenets are used to avoid the culmination of a love-story. Manimegalai is believed to be the anti-love story sequel to the Sillapadikaram.
A complete work of Tamil epic written by hand on leaves Image source: wikimedia commons
The Sillapadikaram was written by a Jain monk, Illango Adigal, and Sattanar, uses the sequel to question Jainism. It is almost a political battle between two new religions competing for a place in a predominantly Hindu society. Parts of Manimegalai even go to the extent of opening ridiculing Jain practices and beliefs.
Critics of Tamil literature have stated that while the Tamil epics have great poetic significance, they are inferior to other world epics when it comes to clearly portraying religious affiliations. In fact, they refer to the newer religions with an infant's perspective. Some scholars have found that Sillapadikaram has more ethical substance than its sequel, but in and of itself, despite being written by a Jain monk, reads like Hindu poetry (Subhramanya Aiyar, 1906).
Keywords: Manimegalai, Sillapadikaram, Tamil Epic, Sattanar, Ilango Adigal, Chola kingdom, Sangam Age, Buddhism
The Covid-19 pandemic could act as an inflection point to shift India's growth model from being consumption driven to investments-led. In its Ecoscope report, Motilal Oswal Financial Services, said: "With Covid-19 hurting India's 'Household' (HH) and 'Government' sectors adversely, the continuity of strong consumption growth is in question."
"On the contrary, with listed companies' financial positions improving and an uptick in household investments in the Real Estate sector (called physical savings), the narrative of investment-led recovery is gaining momentum." The report prescribed that various economic participants - households, governments, listed companies, and unlisted corporates -- to increase their fixed asset investments in the immediate future based on their financial position.
The Covid-19 pandemic could act as an inflection point to shift India's growth model from being consumption driven to investments-led. | Photo by Fusion Medical Animation on Unsplash
At present, the listed and unlisted corporate sector accounts for only about half of total investments in India. The 'HH' sector including unincorporated enterprises accounts for 35-40 per cent in India's investments, while the remaining 12-13 per cent is contributed by centre and states governments. Besides, the report cited that demand environment is expected to remain subdued due to weak financial position of 'HH' and government sector.
"Despite household investments picking up strongly in 2HFY21, given that Indian households bore the maximum brunt of Covid-led losses in CY20 (and CY21), we believe household spending would remain subdued over the next few years." It further pointed out that unless 'HH', 'Unlisted Corporate', and government sectors can improve their financial positions -- leading to a demand uptick -- a strong revival in investments seems challenging. (IANS/ MBI)
Keywords: India, covid, pandemic, growth, household, government, investment