Scientists Discover Fountain of Mysterious Space Dust

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Who knew that the solar system was actually full of space dust, instead of being mostly empty? Scientists have determined that our solar system is currently experiencing a cosmic dust storm, with at least three times as much dust passing through compared to just a few years ago, according to Space.com.

“We not only do not know what the stuff is, but we do not know where it is made or how it gets into space,” said Donald York, a professor of astronomy and astrophysics at the University of Chicago and part of the team working on the problem, in the article.

Where is it all coming from? The scientists cited the double star system HD 44179, which lies in the Red Rectangle 2,300 light-years away, as the culprit. The report said that the increase in dust in our system is due to a periodic weakening of the sun’s magnetic field, and that sometime in the next 10,000 years, we’ll plow through the G-cloud, a region of dust more dense than the one we’re currently sailing through. Good times.

Scientists Discover Source of Moons Magnetism

Moon_Earth_NASA_AP.jpgA group of MIT researchers believe they have discovered the source of the moon’s magnetism, a puzzler that has baffled scientists since the 1970s when Apollo astronauts first brought moon rocks to Earth, Space.com reports.

“Earth’s rotating, iron core produces the planet’s magnetic field. But the moon does not have such a setup,” the report said. Instead, MIT scientists now believe that the Moon did in fact have a liquid core with a dynamo about 4.2 billion years ago. Most moon rocks lose their traces of magnetism when subjected to major shocks from impacts. But the scientists found their smoking gun by examining the oldest moon rock brought to Earth—by Harrison “Jack” Schmitt, the only geologist ever to walk on the moon, during the last lunar landing mission, Apollo 17, in 1972.

“Many people think that it’s the most interesting lunar rock,” said MIT’s Ben Weiss in the article; his team found traces of the original magnetic field using a commercial rock magnetometer equipped with a robotic system geared toward detecting faint traces of magnetism. The report said that the findings fit in with the prevailing theory that the moon was born when a Mars-sized body crashed into the Earth and blasted much of its crust into space, where it clumped together to form the moon.

Scientists: Exoplanet May Be Earth-Sized

Exoplanet_ESO.jpgLast year, astronomers discovered a planet, thought to be about the size of three Earths, orbiting a star in the prime of its life. It led to speculation that scientists could determine its atmospheric composition and, eventually, figure out whether it could support life. Now a New Scientist report suggests that the planet—officially (and unimaginatively) named MOA-2007-BLG-192-L b—may be even smaller.

“This is the lowest-mass planet yet detected, and is extremely close to the mass of the Earth,” Scott Gaudi of Ohio State University in Columbus, who is not on the team that discovered the planet, said in the article. “Obviously, finding a true Earth-mass planet is one of the biggest goals of searches for exoplanets. We are very close to that goal now.”