The chaotic early phase of the solarsystem ETH_en NatureAstronomy
Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the short-livedAg decay system to date rapid core cooling by determining Pd–Ag ages for iron meteorites. We show that closure times for the iron meteorites equate to cooling in the time frame ~7.8–11.
7 Myr after calcium–aluminium-rich inclusion formation, and that they indicate that an energetic inner Solar System persisted at this time. This probably results from the dissipation of gas in the protoplanetary disk, after which the damping effect of gas drag ceases. An early giant planet instability between 5 and 14 Myr after calcium–aluminium-rich inclusion formation could have reinforced this effect.
United States Latest News, United States Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Kate Middleton Was Adorably Nervous When the Queen Visited Her “Back to Nature” GardenShe was even stuffing stray twigs in her designer handbag, just so it looked perfect for Her Majesty.
Read more »
Binarity of a protostar affects the evolution of the disk and planets - NatureBinarity and multiplicity in general strongly affect the properties of emerging stars, as well as the physical and chemical structures of protoplanetary disks and therefore potentially any emerging planetary systems.
Read more »
Boosting plant genome editing with a versatile CRISPR-Combo system - Nature PlantsPan et al. develop a versatile CRISPR-Combo platform for simultaneous genome editing (targeted mutagenesis or base editing) and gene activation in plants, representing a versatile genome engineering tool with promising applications in crop breeding.
Read more »
Astronomers Capture First Image of Milky Way’s Supermassive Black Hole | Sci-News.comThe new image produced by the Event Horizon Telescope (EHT) Collaboration shows the area close to the event horizon of Sagittarius A* (Sgr A*), the 4.3-million-solar-mass black hole at the center of our Milky Way Galaxy.
Read more »
India’s Acme Solar Plans 7 Gigawatt Renewable Energy Green Ammonia PlantOne of India’s leading independent solar power producers, Acme Solar Holdings, has announced ambitious plans to expand its renewable power and green hydrogen portfolio.
Read more »
Meghan Markle Channels Princess Diana in Polka Dots at Prince Harry's Polo MatchMeghan Markle wore breezy Bermuda shorts and polka dots for her latest outing with Prince Harry.
Read more »