Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Moon formed after collision of planets

06.06.2014

Göttingen scientists confirm “Giant impact“ theory – Lunar samples analyzed at Göttingen University

Scientists from the Universities of Göttingen, Cologne, and Münster in Germany have resolved an isotopic difference between the Earth and the Moon.

The slight variation in oxygen isotopes confirms the “Giant impact“ hypothesis of Moon formation, according to which the Moon formed from the debris of a giant collision between the Earth and another proto-Planet about 4.5 billion years ago. The results were published in the journal Science.

In the Stable Isotope Laboratory at Göttingen University’s Geoscience Centre, the scientists analyzed samples from the Moon that were provided by NASA. The lunar basalts were brought back to Earth between 1969 and 1972 with Apollo Missions 11, 12, and 16.

They released the oxygen from the rocks, purified it and measured the pure oxygen gas in the mass spectrometer. “For the first time, we were able to show a subtle difference between the rare 17O isotope and the abundant 16O isotope,” explains Dr. Daniel Herwartz, who lead the study at Göttingen University and is now employed at the University of Cologne.

“The similar isotopic composition of Earth and Moon appeared to be at odds with the giant impact hypothesis, because numerical models of the collision predicted a difference. The difference we found is smaller than initially predicted, but that might be due to the fact that both planets originated from the same region of the solar system.”

Only a few laboratories worldwide are able to measure the rare 17O isotope at all. “For the last three years, staff and students in Göttingen have persistently worked on improving the analytical procedure,” says Prof. Dr. Andreas Pack, head of the Stable Isotope Laboratory at Göttingen University’s Geoscience Centre.

“The results of this study show that this effort has paid off.” Some of the data were measured by student Bjarne Friedrichs for his Bachelor’s thesis.

Original publication: Daniel Herwartz, Andreas Pack, Bjarne Friedrichs, Addi Bischoff. Identification of the giant impactor Theia in lunar rocks. Science 2014. Doi: 10.1126/science.1251117.

Contact:
Dr. Daniel Herwartz
University of Cologne – Environmental Isotope Geochemistry
Greinstraße 4-6, 50939 Köln, Germany
Phone +49 221 470-3240 or +49 177 319 4278
Email: d.herwartz@uni-koeln.de

Prof. Dr. Andreas Pack
University of Göttingen
Geoscience Centre – Department of Isotope Geology
Goldschmidtstraße 3, 37077 Göttingen, Germany
Phone +49 551 39-12254 or +49 175 298 1638
Email: apack@uni-goettingen.de

Prof. Dr. Addi Bischoff
University of Münster
Institute for Planetology
Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
Phone +49 251 83-33465
E-Mail: bischoa@uni-muenster.de

Weitere Informationen:

http://www.geologie.uni-koeln.de/1720.html
http://www.uni-goettingen.de/en/77365.html
http://www.uni-muenster.de/Planetology/ifp/personen/bischoff_addi/addihome.html

Thomas Richter | Georg-August-Universität Göttingen

Further reports about: Earth Environmental Geoscience Identification Moon Planetology collision difference isotope lunar

More articles from Earth Sciences:

nachricht By saving cost and energy, the lighting revolution may increase light pollution
23.11.2017 | Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ

nachricht Frictional Heat Powers Hydrothermal Activity on Enceladus
23.11.2017 | Universität Heidelberg

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Underwater acoustic localization of marine mammals and vehicles

23.11.2017 | Information Technology

Enhancing the quantum sensing capabilities of diamond

23.11.2017 | Physics and Astronomy

Meadows beat out shrubs when it comes to storing carbon

23.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>