Occurring March 17, it was the biggest explosion in the 8-year history of NASA’s Lunar Impact Monitoring program that shoots continual video of the moon through 14-inch telescopes on Earth. NASA announced the event on May 17 after an analyst noticed the strike on a digital video. Scientists estimate the meteor weighed 88 pounds, was about 16 inches wide, and hit the moon at 56,000 miles per hour.
Steve Roy, Marshall Space Flight Center
An artist’s rendering of a small but powerful meteor strike on the moon.
In this Q&A Smithsonian Geophysicist Bruce Campbell, of the Air and Space Museum’s Center for Earth and Planetary Studies, answers a few questions about the explosion and the geologic processes that shape the moon’s surface. For years Campbell has been using radio telescopes to see through the moon’s thick layer of dust and debris and create a detailed radar map of the moon’s ancient bedrock topography.Q: Can the crater caused by this impact be seen from Earth?
Campbell: There is erosion on the moon which is coming from the exact process that caused this new crater. Think about it, that new 20-meter crater obliterated all the little craters that were in that spot before it. And it threw out dust that covered up and smoothed out other areas.
But even when fresh bedrock from beneath the dust is exposed by very large meteorite strikes, these new rocks are eventually broken down by the little bits of space dust zipping in and striking the moon day in and day out. In general, these tiny particles are traveling extremely fast. Most hit the ground at 2 kilometers per second or more. Even a particle of dust that’s moving at several kilometers per second will break a pretty good chunk off a rock on the ground.
Undetectable from Earth, these little particles are the dominant erosive effect on the moon…on a cosmic time scale these particles are just raining in. This crater is just part of that endless process of the soil gradually building up and rocks on the surface being broken down and craters being smoothed out. If you look at the pictures, the moon’s features are very rounded with gentle slopes; there are almost no sharp-edged hills on the moon.
Alison Mitchell | Newswise
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28.03.2017 | Aalto University
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
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