News About Asteroids And Comets
November 28, 2016
Chicxulub : a unique crater to elucidate planetary surfaces
Paris, France (SPX) Nov 25, 2016
The fall of an asteroid in the Yucatan Peninsula (Mexico) 66 million years ago is believed to have caused the extinction of dinosaurs. It also created the Chicxulub impact crater, the only such crater on Earth that still has a peak ring - a type of structure commonly found, in contrast, on the surface of several objects in the Solar System. As a result, and despite the crater being buried under several hundred meters of sediment, scientists the world over will do anything to uncover its secrets. T ... read more

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Icy surprises at Rosetta's comet
As Rosetta's comet approached its most active period last year, the spacecraft spotted carbon dioxide ice - never before seen on a comet - followed by the emergence of two unusually large patches of ... more
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Report confirms scientific benefits of NASA's Asteroid Redirect Mission
A new report provides expert findings from a special action team on how elements of the Asteroid Redirect Mission (ARM) can address decadal science objectives and help close Strategic Knowledge Gaps ... more
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NASA Renews Search for Antarctic Meteorites
Three federal entities, including NASA, are reaffirming their commitment to search for Antarctic meteorites, to help learn more about the primitive building blocks of the solar system and answer que ... more
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Scientists voice support for asteroid deflection mission
Scientists in Europe want to ensure the European Space Agency doesn't abandon its plans to study and test the latest asteroid deflection technologies. ... more
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New Study Reveals Relationships Between Chemicals Found on Comets
A new study has revealed similarities and relationships between certain types of chemicals found on 30 different comets, which vary widely in their overall composition compared to one another. The r ... more
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Comet 67P is younger than scientists thought
Based on data from the Rosetta space probe, scientists have so far assumed that the comet 67P/Churyumov-Gerasimenko originated from the initial phase of our solar system. ... more
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Greenland fossils reveal global ecosystem recovery after mass extinction
A new study published in Scientific Reports shows how higher latitude ecosystems recovered after the World's most cataclysmic extinction event 252 million years ago. "Life on the sea floor had total ... more
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Key agencies conduct asteroid emergency planning exercise
What would we do if we discovered a large asteroid on course to impact Earth? While highly unlikely, that was the high-consequence scenario discussed by attendees at an Oct. 25 NASA-FEMA tabletop ex ... more
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Prototype Capture System, Mock Asteroid Help Simulate Mission Sequence
A prototype of the Asteroid Redirect Mission (ARM) robotic capture module system is tested with a mock asteroid boulder in its clutches at NASA's Goddard Space Flight Center in Greenbelt, Maryland. ... more
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Scientists reveal how Orientale crater formed on the Moon billions of years ago
Scientists have simulated the conditions that formed a huge bullseye-shaped crater on the Moon, called Orientale. The Orientale impact basin is located on the Moon's south western region, or t ... more
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Study Reveals Relationships Between Chemicals on Comets
A new study has revealed similarities and relationships between certain types of chemicals found on 30 different comets, which vary widely in their overall composition compared to one another. The r ... more
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15000 space rocks and counting
The international effort to find, confirm and catalogue the multitude of asteroids that pose a threat to our planet has reached a milestone: 15 000 discovered - with many more to go. The number of c ... more
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OSIRIS-REx conducts thruster test on route to asteroid Bennu
NASA's OSIRIS-REx spacecraft continues its so far flawless journey to asteroid Bennu, after successfully completing its first Trajectory Correction Maneuver (TCM-1) on Oct. 7. According to the missi ... more
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Astronomers Predict Birthplace of Rosetta's Comet
When the Rosetta spacecraft successfully touched down on comet 67P/Churyumov-Gerasimenko on September 30, 2016, the news was shared globally via Twitter in dozens of languages. Citizens the world ov ... more
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Unexpected discoveries on a metal world
Astronomers have discovered possible evidence for water on the surface of the largest metallic asteroid in the solar system. Named 16 Psyche, the object is one of the most massive in the asteroid be ... more
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Avalanches, Not Internal Pressure, Cause Comet Outbursts
Outbursts of comet nuclei are likely caused by surface avalanches rather than geyser-like eruptions from within, research by the Planetary Science Institute's Jordan Steckloff shows. Rapid asy ... more
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Study suggests comet strike's link to age-old warming event
Scientists have found direct evidence that a comet struck the Earth more than 50 million years ago, coinciding with a warm period often compared with today's global warming, a report said Thursday. ... more
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Kepler Gets the 'Big Picture' of Comet 67P
On Sept. 30, the European Space Agency concluded its Rosetta mission and the study of comet 67P/Churyumov-Gerasimenko. During the final month of the mission, NASA's planet-hunting Kepler spacecraft ... more
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Origin of minor planets' rings revealed
A team of researchers has clarified the origin of the rings recently discovered around two minor planets known as centaurs, and their results suggest the existence of rings around other centaurs. Th ... more
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Rosetta's comet adventure in numbers
Europe's ground-breaking quest to unravel the Solar System's mysteries concludes Friday with the Rosetta comet chaser crashlanding onto the cosmic wanderer's rocky surface. ... more
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Rosetta: The end of a fairytale
The European Space Agency bid a poignant farewell Friday to intrepid space explorers Philae and Rosetta, brought to "life" as loveable cartoon characters that it has had to abandon on a cold, dark c ... more
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Rosetta measures production of water at comet over two years
Over the past two years, Rosetta has kept a close eye on many properties of Comet 67P/Churyumov-Gerasimenko, tracking how these changed along the comet's orbit. A very crucial aspect concerns how mu ... more
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Alice Ultraviolet Spectrograph Completes Rosetta Mission to Comet 67P
After a two-year orbital tour around comet 67P/Churyumov-Gerasimenko, ESA's Rosetta spacecraft - carrying Southwest Research Institute's Alice ultraviolet spectrograph - will end its mission this we ... more
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Farewell Rosetta: ESA Mission to Conclude on Comet's Surface
The European Space Agency's (ESA) Rosetta mission will come to a dramatic end on Friday, Sept. 30, with a controlled touchdown of the spacecraft on a region of comet 67P/Churyumov-Gerasimenko known ... more
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