NASA’s Dawn spacecraft won’t end its 13-month-long visit to Vesta, the Solar System’s second biggest asteroid, until August, but researchers have now solidified the rock’s reputation as an archetype for understanding planetary evolution. In six reports in the 11 May edition of Science, Dawn mission scientists have confirmed several long-held assumptions about Vesta and detailed some puzzles about the roughly 520-kilometer-diameter body.
NatureNews (blog) Ron Cowen: Vesta confirmed as venerable planet progenitor ; the ‘confirmed’ in the hed is a good way to say this is not surprise news, but incremental news. Cowen, on constant prowl for news before it is wide news, includes a link to a previous post on Vesta’s topography and what it might mean, from meetings last fall.
[NatureNews’] ace scoop-hungry reporter Ron Cowen late last week filed on a report, at the preprint server for physics-related news arXiv, that a large international team has gotten an image of a galaxy as it was when the universe was a mere 490 million years old.
Cowen writes the story well, and includes the enticing angle that if NASA’s Webb Telescope survives its budgetary excesses and goes into operation, its large IR mirror should offer a much better look at this galaxy – dubbed MACS1149-JD1.
American Scientist republished part of the article as part of its Science in the News section, which is a roundup of the most important and exciting science news pieces.
The article was mentioned here, on my Tumblr site, shortly after publication.
Infant galaxy offers tantalizing peek at early Universe
Astronomers are claiming a new benchmark in the quest to see the Universe’s first galaxies. By taking advantage of a rare cosmic zoom lens — where the gravity of a large mass magnifies light from objects in the distant background — a team of US and European researcher has spotted a galaxy so remote its light was emitted just 490 million years after the Big Bang, when the Universe was a mere 3.6% of its current age.
Read my entire article, which includes how existing and upcoming telescope capabilities could be used to investigate this galaxy further and what the find means for our understanding of the Universe’s number of galaxies.
My latest article is about new research that adds to the uncertainty of how the Moon was formed by looking at the Moon’s isotopic composition:
Question over theory of lunar formation
A chemical analysis of lunar rocks may force scientists to revise the leading theory for the Moon’s formation: that the satellite was born when a Mars-sized body smacked into the infant Earth some 4.5 billion years ago.
If that were the case, the Moon ought to bear the chemical signature of both Earth and its proposed ‘second’ parent. But a study published today inNature Geoscience1suggests that the Moon’s isotopic composition reflects only Earth’s contribution.
My latest Scientific American article reports a major breakthrough in modeling…snowflakes:
Snowflake Growth Successfully Modeled from Physical Laws
Mathematicians have re-created the intricate patterns of ice formation, a breakthrough that could lead to new models of red blood cells, soap bubbles and other surfaces that evolve over time
Scientists as far back as Johannes Kepler have pondered the mystery of snowflakes: Their formation requires subtle physics that to this day is not well understood. Even a small change in temperature or humidity can radically alter the shape and size of a snowflake, making it notoriously difficult to model these ice crystals on a computer. But after a flurry of attempts by several scientists, a team of mathematicians has for the first time succeeded in simulating a panoply of snowflake shapes using basic conservation laws, such as preserving the number of water molecules in the air.
At a meeting of the American Astronomical Society, scientists talked about mapping dark matter, measuring the ‘graininess’ of spacetime, and discovering the smallest exoplanets ever, using the Kepler space telescope. Ron Cowen, who reported on the meeting for Nature, discusses those findings.
“Time Crystals” Could be a Legitimate Form of Perpetual Motion
The phrases “perpetual-motion machine”—a concept derided by scientists since the mid-19th century—and “physics Nobel laureate Frank Wilczek” wouldn’t seem to belong in the same sentence. But if Wilczek’s latest ideas on symmetry and the nature of time are correct, they would suggest the existence of a bona fide perpetual-motion machine— albeit one from which energy could never be extracted. He proposes that matter could form a “time crystal,” whose structure would repeat periodically, as with an ordinary crystal, but in time rather than in space. Such a crystal would represent a previously unknown state of matter and might have arisen as the very early universe cooled, losing its primordial symmetries.
One of my hobbies is collecting and researching recording technology from the late 19th century and early 20th century, which represents some of the earliest recordings known. This hobby turned to a front-page New York Times article (Restored Edison Records Revive Giants of 19th Century) with the discovery and identification of late 19th-century cylinder recordings of Bismarck and other German notables:
The cylinders, from 1889 and 1890, include the only known recording of the voice of the powerful chancellor Otto von Bismarck. Two preserve the voice of Helmuth von Moltke, a venerable German military strategist, reciting lines from Shakespeare and from Goethe’s “Faust” into a phonograph horn. (Moltke was 89 when he made the recordings — the only ones known to survive from someone born as early as 1800.)
In June 1889, Edison sent Wangemann to Europe, initially to ensure that the phonograph at the Paris World’s Fair remained in working order. After Paris, Wangemann toured his native Germany, recording musical artists and often visiting the homes of prominent members of society who were fascinated with the talking machine.
Many people love an old recording, but few take their love as far as Patrick Feaster. In my Science article Archaeologist of Sound, Feaster’s work as a sound historian understanding and restoring the earliest known recordings is explored. From the article:
And now Feaster, a friendly but intense 40-year-old with a slender build and a photographic memory for anything phonographic, had first crack at helping bring back to life the lost sounds of 130 years ago. His 2-month stint in the “nation’s attic” had turned up undreamed-of finds, including long-lost cylinders recorded at the 1889 World’s Fair in Paris and what may be the first-ever sound recording on a disk. Archives and artifacts, however, are only part of Feaster’s chosen work. Just as important, he says, is his mission of using modern technology to resurrect long-vanished voices and sounds—some of them never intended to be revived.
By then, Feaster and colleagues David Giovannoni, Richard Martin, and Meagan Hennessey had formed FirstSounds.org, a group devoted to finding and disseminating the earliest sound recordings. The team had been nominated for a Grammy for its CD Actionable Offenses, a compilation of bawdy wax-cylinder recordings from the 1890s. Another CD, Debate ’08, reissued 22 recordings by presidential candidates William Howard Taft and William Jennings Bryan during the 1908 campaign—the first time sound bites were used in a presidential election, Feaster says.
“Today, we can listen—with a little work—to virtually any waveform we can see [Feaster] says. Two years ago, in some of his most far-ranging efforts to date, he applied his software to the musical notation found in a 10th-century manuscript of the Enchiriadis treatise, a medieval work on music theory. The result was a 7-minute sound file that Feaster calls “the closest thing you’re likely to hear to a 1000-year-old phonautogram.” Feaster has also applied software to “play” other historic musical notations—“as though a sound synthesizer were being programmed directly by medieval monks,” he says.