Brahmand NewsPrevious Article
Brahmand NewsNext Article
Headlines
  • NASA's 'Sun-kissing' Parker spacecraft unlocks solar mystery:-NASA's Parker Solar Probe -- which has flown closer to the Sun than any spacecraft ever -- has beamed back the first observations from its close encounters with the Sun, revealing a "spectacular trove" of data about the solar wind and space weather, the US space agency said....
  • Nearly 24 hr countdown begins for launch of RISAT-2BR1:-The nearly 24 hour countdown began Tuesday for the launch of India's radar imaging earth observation satellite RISAT-2BR1 on board PLSV-C48 from its spaceport of Sriharikota, ISRO said....
  • DefExpo 2020:-DefExpo 2020 themed as "Digital Transformation of Defence" will be held from 5 to 8 February 2020, for the first time at Vrindavan Yojna, Sector 15, Lucknow, Uttar Pradesh....
  • Indo Defence 2020 Expo & Forum :-The Indo Defence Expo 2020 Expo & Forum will be held at Jakarta International Expo Kemayoran, Indonesia, from 4 to 7 November 2020. ...

Evidence that Moon was created in giant smashup

Line Spacing+- AFont Size+- Print This Article

WASHINGTON (PTI): Researchers claim to have found fresh physical evidence that the Moon was born in a flaming blaze when a Mars sized body smashed into the early Earth in a cataclysmic collision.

Analysis of lunar rocks brought back by the Apollo missions shows they have heavier forms of zinc - a telltale sign of the impact billions of years ago.

Without the Moon, there may have been no life on Earth because it once orbited much closer to us than it does now causing massive tides to ebb and flow every few hours.

These tides caused dramatic fluctuations in salinity around coastlines which are believed to have driven the evolution of primitive DNA-like biomolecules.

Researchers led by Dr. Frederic Moynier from Washington University said the zinc enrichment probably arose because heavier atoms condensed out of the cloud of vapourised rock quicker than lighter ones.

Researchers analysed 20 samples of Moon rocks including ones from the Apollo 11, 12, 15 and 17 missions and one lunar meteorite.

"What we wanted were the basalts because they're the ones that came from inside the Moon and would be more representative of the Moon's composition," Moynier, said.

Scientists have been looking for this kind of sorting by mass - called isotopic fractionation - since the Apollo missions first brought Moon rocks to Earth in the 1970s.

Compared to terrestrial or Martian rocks, the lunar rocks have much lower concentrations of zinc but are enriched in the heavy isotopes of zinc.

"The magnitude of the fractionation we measured in lunar rocks is 10 times larger than what we see in terrestrial and Martian rocks, so it's an important difference," Moynier said.

Earth and Mars have isotopic compositions like those of chondritic meteorites, which are thought to represent the original composition of the cloud of gas and dust from which the solar system formed.

The most likely large-scale event is wholesale melting during the formation of the Moon.

The zinc isotopic data therefore supports the theory a giant impact gave rise to the Earth-Moon system.

"The work also has implications for the origin of the Earth because the origin of the Moon was a big part of the origin of the Earth," Moynier said in a statement.

Without the stabilising influence of the Moon, the Earth would probably be a very different sort of place.

Scientists believe the Earth would spin more rapidly, days would be shorter, weather more violent and climate more chaotic and extreme.

The study findings are published in the journal Nature.

Tags:

Line Spacing+- AFont Size+- Print Article

Other Related News

Latest Moon flyby finds no trace of India's Chandrayaan-2 Vikram lander: NASA

NASA has found no evidence of Chandrayaan-2's Vikram lander in the images captured during a latest flyby of its Moon orbiter of the lunar region where India's ambitious mission attempted a soft landing, the US space agency has said.

Upcoming Defence Exhibitions

BRAHMOS Missile Systems

Headlines

Brahmand World Defence Update 2019

Image Gallery