Current Asteroids News and Events

Current Asteroids News and Events, Asteroids News Articles.
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The comet that killed the dinosaurs
In a study published in Scientific Reports, Avi Loeb puts forth a new theory that could explain the origin and journey of the comet that killed the Chicxulub impactor and others like it. (2021-02-15)

Remote sensing data sheds light on when and how asteroid Ryugu lost its water
Rocks on Ryugu, a 'rubble pile' near-Earth asteroid recently visited by Japan's Hayabusa2 spacecraft, appear to have lost much of their water before they came together to form the asteroid, new research suggests. (2021-01-05)

SwRI-led team finds meteoric evidence for a previously unknown asteroid
A Southwest Research Institute-led team of scientists has identified a potentially new meteorite parent asteroid by studying a small shard of a meteorite that arrived on Earth a dozen years ago. The composition of a piece of the meteorite Almahata Sitta (AhS) indicates that its parent body was an asteroid roughly the size of Ceres, the largest object in the main asteroid belt, and formed in the presence of water under intermediate temperatures and pressures. (2020-12-21)

Can white dwarfs help solve the cosmological lithium problem?
For the first time, lithium has been identified and measured in the atmosphere of a white dwarf. The finding, reported by the University of North Carolina at Chapel Hill, provides clues for what's become of the lithium expected from the Big Bang. (2020-12-17)

Mass extinctions of land-dwelling animals occur in 27-million-year cycle
Mass extinctions of land-dwelling animals--including amphibians, reptiles, mammals, and birds--follow a cycle of about 27 million years, coinciding with previously reported mass extinctions of ocean life, according to a new analysis published in the journal Historical Biology. (2020-12-11)

Researchers discover a new superhighway system in the Solar System
Researchers have discovered a new superhighway network to travel through the Solar System much faster than was previously possible. Such routes can drive comets and asteroids near Jupiter to Neptune's distance in under a decade and to 100 astronomical units in less than a century. They could be used to send spacecraft to the far reaches of our planetary system relatively fast, and to monitor and understand near-Earth objects that might collide with our planet. (2020-12-09)

Key building block for organic molecules discovered in meteorites
Scientists from Japan and the USA have confirmed the presence in meteorites of a key organic molecule which may have been used to build other organic molecules, including some used by life. The discovery validates theories of the formation of organic compounds in extraterrestrial environments. (2020-12-07)

Rochester researchers uncover key clues about the solar system's history
Researchers have used magnetism to determine, for the first time, when asteroids that are rich in water and amino acids first arrived in the inner solar system. (2020-12-04)

Gaia space telescope measured the acceleration of the Solar System
The Gaia space telescope has measured the acceleration of the Solar System when it orbits the center of our Milky Way galaxy. The Solar System motion relative to the stars agrees with the results by Finnish astronomers in the 19th century. (2020-12-03)

Chaotic early solar system collisions resembled 'asteroids' arcade game
One Friday evening in 1992, a meteorite ended a more than 150 million-mile journey by smashing into the trunk of a red Chevrolet Malibu in Peekskill, New York. Nearly 30 years later, a new analysis of that same Peekskill meteorite and 17 others by researchers at The University of Texas at Austin and the University of Tennessee, Knoxville, has led to a new hypothesis about how asteroids formed during the early years of the solar system. (2020-12-02)

Fast-moving gas flowing away from young star caused by icy comet vaporisation
A unique stage of planetary system evolution has been imaged by astronomers, showing fast-moving carbon monoxide gas flowing away from a star system over 400 light years away, a discovery that provides an opportunity to study how our own solar system developed. (2020-11-30)

SwRI scientist studies tiny craters on Bennu boulders to understand asteroid's age
Last week NASA snagged a sample from the surface of asteroid Bennu, an Empire State Building-sized body that Southwest Research Institute scientists have helped map with nearly unprecedented precision. Using orbital data from the OSIRIS-REx spacecraft, researchers measured centimeter- to meter-sized craters on the boulders scattered around its rugged surface to shed light on the age of the asteroid. (2020-11-10)

Researchers present wild theory: Water may be naturally occurring on all rocky planets
Life is deeply dependent on water, but where does water come from? Based on new research, researchers from the University of Copenhagen believe it may emerge in connection with the formation of planets. (2020-11-09)

Asteroid's scars tell stories of its past
Asteroid Bennu, which was just sampled by NASA's OSIRIS-REx mission, only recently migrated into Earth's neighborhood, according to a detailed analysis of impact marks on boulders on its surface. The report provides a new benchmark for understanding the evolution of asteroids and offers insights into space debris hazardous to spacecraft. (2020-10-30)

Asteroid Ryugu shaken by Hayabusa2's impactor
Professor ARAKAWA Masahiko (Graduate School of Science, Kobe University, Japan) and Hayabusa2 mission members discovered more than 200 boulders, which either newly appeared or moved as a result of the artificial impact crater created by the Japanese spacecraft's Small Carry-on Impactor. Boulders were disturbed within a 30m radius from the impact crater center- providing important insight into asteroids' resurfacing processes. (2020-10-29)

SwRI study offers more complete view of massive asteroid Psyche
A new study authored by Southwest Research Institute planetary scientist Dr. Tracy Becker discusses several new views of the asteroid 16 Psyche, including the first ultra-violet observations. The study, which was published today in The Planetary Science Journal and presented at the virtual meeting of the American Astronomical Society's Division for Planetary Sciences, paints a clearer view of the asteroid than was previous-ly available. (2020-10-26)

Scientists author papers in Nature Astronomy chronicling legacy of Spitzer space telescope
NASA's Spitzer Space Telescope, decommissioned earlier this year, made important discoveries about comets, stars, exoplanets and distant galaxies, leaving a lasting legacy of solar system science. A team of more than a dozen scientists from the US and Europe collaborated on two review papers published in the journal Nature Astronomy inventorying the major discoveries made possible by Spitzer. (2020-10-12)

Planetary astronomer co-authors studies of asteroid as member of NASA's OSIRIS-REx mission
NASA's OSIRIS-REx spacecraft mission's first attempt to pick up the sample is scheduled for Oct. 20, 2020, and the spacecraft is scheduled to return the sample back to Earth on Sept. 24, 2023. In advance of the sample collection, the science team published a set of six papers in Science and Science Advances to share its scientific findings to date while building interest in the upcoming event. (2020-10-08)

SwRI scientists study the rugged surface of near-Earth asteroid Bennu
As the days count down to NASA's OSIRIS-REx spacecraft's Touch-And-Go asteroid sample collection attempt, Southwest Research Institute scientists have helped determine what the spacecraft can expect to return from the near-Earth asteroid Bennu's surface. Three papers published online by Science on Oct. 8 discuss the color, reflectivity, age, composition, origin and distribution of materials that make up the asteroid's rough surface. (2020-10-08)

Scientists peer inside an asteroid
New findings from NASA's OSIRIS-REx mission suggest that the interior of the asteroid Bennu could be weaker and less dense than its outer layers--like a crème-filled chocolate egg flying though space. (2020-10-08)

Geoscience: Cosmic diamonds formed during gigantic planetary collisions
Geoscientists from Goethe University have found the largest extraterrestrial diamonds ever discovered - a few tenths of a millimetre in size nevertheless - inside meteorites. Together with an international team of researchers, they have now been able to prove that these diamonds formed in the early period of our solar system when minor planets collided together or with large asteroids. These new data disprove the theory that they originated deep inside planets - similar to diamonds formed on Earth - at least the size of Mercury (PNAS). (2020-09-29)

Remnants of an ancient asteroid shed new light on the early solar system
Researchers have shaken up a once accepted timeline for cataclysmic events in the early solar system. Geological and geochemical records indicate that the Earth-Moon system experienced a period of frequent and cataclysmic impacts from asteroids and other bodies. It was thought that this period had a relatively sudden onset, but the researchers have found evidence that this bombardment period may have started much earlier, and decreased in intensity over time. (2020-09-24)

Ryugu's rocky past
Researchers find evidence that asteroid Ryugu was born out of the possible destruction of a larger parent asteroid millions of years ago. Thanks to the Hayabusa2 spacecraft, the international team was able to study certain surface features in detail. Variations in the kinds of boulders scattered on Ryugu tell researchers about the processes involved in its creation. The study of asteroids including Ryugu informs the study of the evolution of life on Earth. (2020-09-21)

Where rocks come alive: NASA's OSIRIS-REx observes an asteroid in action
In a special collection of research papers published Sep. 9 in the Journal of Geophysical Research: Planets, the OSIRIS-REx science team reports detailed observations that reveal Bennu is shedding material on a regular basis. (2020-09-09)

How small particles could reshape Bennu and other asteroids
NASA's OSIRIS-REx spacecraft observed tiny bits of material jumping off the surface of the asteroid Bennu. A new study tracks where those particles went. (2020-09-09)

Where rocks come alive: OSIRIS-REx observes an asteroid in action
While studying asteroid Bennu up close, NASA's OSIRIS-REx spacecraft witnessed periodic outbursts of material being kicked up from the surface. A dedicated observation campaign revealed details of the activity and the processes likely causing it: impacts by small space rocks known as meteoroids and rocks cracking from thermal stress as Bennu's surface heats up when exposed to the sun and cools during nighttime. (2020-09-09)

Has Earth's oxygen rusted the Moon for billions of years?
To the surprise of many planetary scientists, the oxidized iron mineral hematite has been discovered at high latitudes on the Moon, according to a study led by University of Hawaii researchers. (2020-09-02)

Earth may always have been wet
The Earth is the only planet known to have liquid water on its surface, a fundamental characteristic when it comes to explaining the emergence of life. However, its origin is still debated. In the journal Science dated 28 August 2020, scientists from the CNRS and Université de Lorraine contribute to this debate by showing that most of the water present on the Earth today has probably been there right from the very beginning. (2020-08-27)

Arecibo Observatory returns from tropical storm Isaias lockdown to track asteroid for NASA
Arecibo's Planetary Radar Group quickly shift from storm response to track asteroid 2020 NK1. Before the Arecibo observations, 2020 NK1 was calculated to be one of the biggest threats out of all known asteroids on NASA's list of potential impactors, with about one chance in 70,000 of impacting the Earth between 2086 and 2101. (2020-08-06)

How stony-iron meteorites form
Meteorites give us insight into the early development of the solar system. Using the SAPHiR instrument at the Research Neutron Source Heinz Maier-Leibnitz (FRM II) at the Technical University of Munich (TUM), a scientific team has for the first time simulated the formation of a class of stony-iron meteorites, so-called pallasites, on a purely experimental basis. (2020-07-29)

An origin story for a family of oddball meteorites
Study suggests a family of rare meteorites likely came from an early planetesimal with a magnetic core. (2020-07-24)

Asteroid shower on the Earth-Moon system 800 million years ago revealed by lunar craters
A research team led by Osaka University investigated the formation ages of lunar craters to demonstrate that asteroids of 100 km in diameter were disrupted 800 Ma and that at least (4-5)×1016 kg of meteoroids, approximately 30-60 times more than the Chicxulub impact, must have plunged into the Earth-Moon system. (2020-07-21)

A population of asteroids of interstellar origin inhabits the Solar System
Discovery by Brazilian researcher reported in Royal Astronomical Society's Monthly Notices provides clues for understanding the star nursery from which the Sun emerged. (2020-07-16)

Designing better asteroid explorers
Recent NASA missions to asteroids have used robotic explorers to gather data about the early evolution of our Solar System, planet formation, and how life may have originated on Earth. To design successful robotic explorers, researchers must understand how these explorers impact the surface of asteroids during their touchdown. University of Rochester researchers conducted lab experiments to determine what happens when explorers and other objects touch down on complex, granular surfaces in low gravity environments. (2020-07-14)

The collective power of the solar system's dark, icy bodies
Two new studies by researchers at the University of Colorado Boulder may help to solve one of the biggest mysteries about the dark, icy bodies of the outer solar system: why so many of them don't circle the sun the way they should. (2020-07-07)

Protecting Earth from asteroid impact with a tethered diversion
A new paper published in EPJ Special Topics, co-authored by Flaviane Venditti, Planetary Radar Department, Arecibo Observatory, University of Central Florida, Arecibo, suggests the use of a tether assisted system to prevent PHA impact. (2020-06-18)

First global map of rockfalls on the Moon
A research team from ETH Zurich and the Max Planck Institute for Solar System Research in Göttingen counted over 136,000 rockfalls on the moon caused by asteroid impacts. Even billions of years old landscapes are still changing. (2020-06-08)

New study provides maps, ice favorability index to companies looking to mine the moon
A University of Central Florida team has created an Ice Favorability Index. The geological model explains the process for ice formation at the poles of the moon, and mapped the terrain, which includes craters that may hold ice deposits. The model, which has been published in the peer-reviewed journal Icarus, accounts for what asteroid impacts on the surface of the moon may do to deposits of ice found meters beneath the surface. (2020-06-01)

Astronomers predict bombardment from asteroids and comets in another planetary system
The planetary system around star HR8799 is remarkably similar to our Solar System. A research team led by astronomers from the University of Groningen and SRON Netherlands Institute for Space Research has used this similarity to model the delivery of materials by asteroids, comets and other minor bodies within the system. Their simulation shows that the four gas planets receive material delivered by minor bodies, just like in our Solar System. (2020-05-29)

The asteroids Ryugu and Bennu were formed by the destruction of a large asteroid
What is the origin of the asteroids Bennu and Ryugu, and of their spinning-top shape? Numerical simulations of large asteroid disruptions show that during such events, fragments are ejected and then reaccumulate forming aggregates, some of which have a spinning-top shape. Scientists conclude that the overall properties of Bennu and Ryugu could directly result from the disruption of their parent body. (2020-05-27)

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