Tuesday 18 June 2013

Australian team maps Moon's hidden craters - Phys.Org

Debarjun Saha | 09:32 |
Australian team maps Moon's hidden craters
7 hours ago

The moon is 37 per cent obscured by the Earth's shadow during the partial lunar eclipse above Sydney on June 4, 2012. Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

By combining and topography data collected by satellites, the scientists from Curtin University in were able to use computer modelling to at first identify two basins on the far side of the Moon.

They later developed a high-resolution image to find a total of 280 "candidate basins" which they suspect are craters.

"There are many more (craters) that have been mapped from optical observations or from just the shape of the topography," researcher Will Featherstone told AFP.

"So there's many, many craters that were already known, we've just been able to apply this technique to enhance the ones that aren't so easy to see.

"What we have been able to use is the topography and the gravity together to get a stronger indication that there is something there that needs further investigation."

Featherstone said the researchers looked at the on both the near and far sides of the Moon, the dark side being more challenging because satellites cannot be tracked from Earth when they are on that side.

To get around this, the researchers used data gathered from a mission which used multiple satellites which were tracking each other as they circled the Moon.

"So when the satellite orbiting the Moon went behind the far side and they couldn't be seen from Earth, they could be seen by other satellites," he said.

Featherstone said of the 280 possible craters, the researchers had classified 66 of them as distinctly visible according to both gravity and topography.

Some 66 of the possible 280 additional craters on the Moon, in a photo from Western Australia's Curtin University in Perth released on June 18, 2013. Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

"Scientists can, instead of looking at every square inch of the Moon looking for basins, they can target these areas," he said.

"It just helps investigations of the Moon and the history of the Moon and the ," he added.

The team has also done some work on the gravity of Mars and Featherstone said other data sets were also available for Venus and other planets.

He said scientists were optimistic about further discoveries from applying their techniques to new gravity data from NASA's GRAIL mission, which ended in late 2012 when the two satellites - named Ebb and Flow - were deliberately crashed on the Moon.

Explore further: Looking deep into the Moon's interior to chart its early history

© 2013 AFP

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Australian team maps Moon's hidden craters
7 hours ago

The moon is 37 per cent obscured by the Earth's shadow during the partial lunar eclipse above Sydney on June 4, 2012. Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

By combining and topography data collected by satellites, the scientists from Curtin University in were able to use computer modelling to at first identify two basins on the far side of the Moon.

They later developed a high-resolution image to find a total of 280 "candidate basins" which they suspect are craters.

"There are many more (craters) that have been mapped from optical observations or from just the shape of the topography," researcher Will Featherstone told AFP.

"So there's many, many craters that were already known, we've just been able to apply this technique to enhance the ones that aren't so easy to see.

"What we have been able to use is the topography and the gravity together to get a stronger indication that there is something there that needs further investigation."

Featherstone said the researchers looked at the on both the near and far sides of the Moon, the dark side being more challenging because satellites cannot be tracked from Earth when they are on that side.

To get around this, the researchers used data gathered from a mission which used multiple satellites which were tracking each other as they circled the Moon.

"So when the satellite orbiting the Moon went behind the far side and they couldn't be seen from Earth, they could be seen by other satellites," he said.

Featherstone said of the 280 possible craters, the researchers had classified 66 of them as distinctly visible according to both gravity and topography.

Some 66 of the possible 280 additional craters on the Moon, in a photo from Western Australia's Curtin University in Perth released on June 18, 2013. Australian scientists Tuesday said they had identified a possible 280 additional craters on the Moon, a finding they said could shed light on the history of the Earth's natural satellite.

"Scientists can, instead of looking at every square inch of the Moon looking for basins, they can target these areas," he said.

"It just helps investigations of the Moon and the history of the Moon and the ," he added.

The team has also done some work on the gravity of Mars and Featherstone said other data sets were also available for Venus and other planets.

He said scientists were optimistic about further discoveries from applying their techniques to new gravity data from NASA's GRAIL mission, which ended in late 2012 when the two satellites - named Ebb and Flow - were deliberately crashed on the Moon.

Explore further: Looking deep into the Moon's interior to chart its early history

© 2013 AFP

orbit diagram application
created53 minutes agoI would like to have a nice picture/simulation of the Earth - Apophis encounter on April 13th 2029. I found this applet ...
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created22 hours agoI need to graph the Ecliptic at a Radius, R, around the earth. It intersects the equator axis at the equinoxes. The Angle from the equinoxes...
A couple questions about The Big Bang Theory
createdJun 16, 2013I understand the concept used here, but am unsure about how scientists can be so sure of the actual age of our universe. They explain it by saying...
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createdJun 16, 2013Which of them larger? The gravity of the earth to the moon or the gravity of the sun to the moon?
used an app to locate Saturn
createdJun 15, 2013Hey, was just wondering, yesterday I was looking through my 10x50 binocular and used an app to locate Saturn. What I was seeing in the binocular was...
ugriz vs. u'g'r'i'z'?
createdJun 12, 2013I've searched around but can't seem to seem anything that addresses the differences between ugriz filters and u'g'r'i'z' filters. What are...

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Using detailed topographic information from NASA's Lunar Reconnaissance Orbiter mission, Curtin's Western Australian School of Mines (WASM) spatial scientists, Dr. Christian Hirt and Professor Will ...

Looking deep into the Moon's interior to chart its early history

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The herbal extract of a yellow-flowered mountain plant long used for stress relief was found to increase the lifespan of fruit fly populations by an average of 24 percent, according to UC Irvine researchers.

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