The Young Astronomers
Posts by: YusefK
The commonly accepted theory among scientists concerning Moon formation could be altered by a new study of lunar isotopes. (Variations of elements containing differing amounts of neutrons).
Luna Credit: NASA
Nearly half of the Moon was postulated to be from Theia, a planetary body, thought to have collided with Earth four point five billion years ago. The recent study by Junjun Zhang, an isotope geo-chemist at the Chicago Center for Cosmo-chemistry and his team challenged this premise. Initially, an analysis of twenty-four rocks from the lunar surface revealed a paucity of indications concerning similarities between the Moon and Earth. However, the group failed to consider the effect of cosmic rays, streams of charged particles racing through space. After amending their research on the Moon’s isotopes of titanium, they found its ratio to be in the ballpark of our planet’s chemistry.
The unlikelihood of Theia’s chemistry being nearly identical to the Earth prompted scientists to reconsider their model. They theorized, perhaps the planetary body collided and caused more joining of debris than previously suggested. This could infer, the majority of Theia’s constitution is hidden deep within the Moon, while Earth’s composition lays conspicuously on the surface.
Suggestions of a collision between a dual moon systems arose as well, inferring that one of our past satellites had a chemistry similar to the Earth. Scientists cannot know for sure, whether their ideas are correct or not, they are still theories. However, the research team plans on conducting more experiments on the isotopes of different elements found on the Moon.
You can read more about these findings at http://news.yahoo.com/moon-formation-theory-challenged-study-160608598.html
Note from the Young Astronomers Admin Team:
This is the first by our new editor YusefK and we would all like to welcome him to the team!
When you picture the world’s best site for astronomy, places like the Gemini Observatory in Chile or the W.M. Keck in Hawaii probably come to mind. Well think again, because the new epicenter of observing could be the coldest place on earth, Antarctica. After performing a careful analysis of the continent, scientists from America and Australia have pinpointed a prime location for ground based research. Several countries have already laid claim to the icy real estate, such as China, France, Russia and South Africa. The success of these countries’ scientific bases led to the development of more stations. We could owe our future understanding of the universe to those who work and live in this region.
Antarctica Credit: NASA, Davepape
Radio astronomers have already conducted research in the polar area. It was Martin Pomerantz who postulated that Antarctica was the best place for ground based astronomy. He was correct, but only under certain wavelengths. Until now, those who wanted to see the universe were out of luck. Nevertheless, the new site found by American and Australian scientists is expected to yield images three times sharper than today’s best observatories. Those of us who spend clear nights under the stars understand the importance of certain atmospheric factors. Things like water vapor in the air, temperature changes and darkness greatly affect our observing.
The location of this new site is a frozen plateau called Ridge A. Ridge A’s atmosphere is steady enough for average instruments to perform better than today’s common observatories. Imagine the potential of an eight inch Cassegrain in perfect weather conditions and the images would be stunning, when the larger facilities are established. The night sky above the summit is perfect for astronomical observing because it is calmer, dryer and darker than any ever known. Those who study and live in Antarctica will benefit from this treasure trove of unexplored skies. However, they will have to contend with several inhospitable factors foreign to the common scientist.
Living in Antarctica seems to be a challenge taken by the very eccentric or very passionate. Generally, scientists take a plane to the Falkland Islands and then a ship to Antarctica. There, they work with several professionals in the coldest and driest place on earth. Nevertheless, I have read the quarters are comfortable and the canned food isn’t half bad, either. Scientists work with a diverse group of people for months at a time and under strange and adverse conditions. So, for all budding astronomers and researchers, consider the South Pole for future endeavors in understanding the universe.
Sources:
http://www.antarctica.ac.uk/employment/locations/antarctica/living_in_antarctica.php
http://www.nsf.gov/pubs/1997/antpanel/4past.htm
http://www.physorg.com/news170932769.html
http://www.universetoday.com/38749/astronomers-find-worlds-best-observing-site/
AAPOD
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