We describe the result of our numerical orbit simulation which traces dynamical evolution of new comets coming from the Oort Cloud. We combine two dynamical models for this purpose.
Meteorites & Asteroids
Posted inAstrochemistry, Astrogeology, Biosignatures & Paleobiology, Comets and Asteroids, Meteorites & Asteroids, Press Release, Sample Return
NASA Media Briefing On OSIRIS-REx Asteroid Sample Mission Findings
NASA will brief media at 11 a.m. EST Wednesday, Jan. 29, to provide an update on science results from NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security – Regolith […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Meteorites & Asteroids, Status Report
The Rapid Formation of Macromolecules in Irradiated Ice of Protoplanetary Disk Dust Traps
Organic macromolecular matter is the dominant carrier of volatile elements such as carbon, nitrogen, and noble gases in chondrites — the rocky building blocks from which Earth formed. How this […]
Posted inComets and Asteroids, Extinction events, Impact events, Mapping, Geodesy, Cartography, Bathymetry, Meteorites & Asteroids, Press Release
Chicxulub Asteroid Impact Sulfur Release Was Less Lethal In Dinosaur Extinction
Approximately 66 million years ago, the Chicxulub asteroid, estimated to be 10-15 kilometer in diameter, struck the Yucatán Peninsula (in current-day Mexico), creating a 200-kilometer-wide impact crater. This impact triggered […]
Posted inBiophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Habitable Zones, Meteorites & Asteroids, Microbiology & Virology, Panspermia, Planetary Protection & Biosafety, Status Report
Survival and Transfer of Microorganisms Beyond the Earth: To What Extent are Microorganisms Tolerant to External Influences?
The study of microorganism tolerance to extreme influences is an integral part of astrobiology.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Interstellar, Meteorites & Asteroids, Status Report
Production of Linear Alkanes via the Solid-state Hydrogenation of Interstellar Polyynes
Highly unsaturated carbon chains, including polyynes, have been detected in many astronomical regions and planetary systems.
Posted inAstrogeology, Impact events, Meteorites & Asteroids, Panspermia, Status Report
Exchange Of Meteorites Between The Terrestrial Planets And The Moon
The evolution of the orbits of bodies ejected from the Earth, Moon, Mercury and Mars was studied. At ejection velocities about 12-14 km/s, the fraction of bodies ejected from the […]
Posted inArtemis & Lunar Exploration, Astrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Icy Worlds, Mapping, Geodesy, Cartography, Bathymetry, Meteorites & Asteroids, Moon, Press Release, Water/Hycean Worlds & Oceanography
Study Reveals Origins Of Lunar Water And Its Connection To Earth’s Early History
The team analyzed water in nine samples from the Apollo lunar mission, using a high-precision triple oxygen isotope technique. This method, developed by Dr. Morgan Nunn Martinez of the University […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extinction events, Fossils & Paleontology, Habitable Zones, Imaging & Spectroscopy, Impact events, Lava / magma ocean / Volcanic Worlds, Meteorites & Asteroids, Press Release
Massive Volcanic Eruptions Did Not Cause The Extinction Of Dinosaurs
Massive volcanic eruptions on the Indian peninsula have long been proposed as an alternative cause for the demise of the dinosaurs. This phase of active volcanism took place in a […]
Posted inAstrogeology, Astronomy & Telescopes, Comets and Asteroids, Exoplanets, -moons, -comets, Extinction events, Imaging & Spectroscopy, Impact events, Meteorites & Asteroids, Press Release, TRAPPIST-1
The Smallest Asteroids Ever Detected In The Main Belt
The asteroid that extinguished the dinosaurs is estimated to have been about 10 kilometers across. That’s about as wide as Brooklyn. Such a massive impactor is predicted to hit Earth […]