New study suggests organic molecules on Ceres came from Asteroids, not volcanoes
Recent findings from NASA's Dawn spacecraft have led scientists to reconsider how organic molecules ended up on the dwarf planet Ceres. Previously, it was believed that cryovolcanic activity—volcanoes that erupt icy materials—in Ceres' interior brought these organic compounds to the surface. However, new research from the Max Planck Institute for Solar System Research (MPS) in Germany suggests a different origin.
The study indicates that organic molecules on Ceres were likely deposited by asteroid impacts rather than being formed internally through volcanic processes. By analyzing spectral imaging data from the Dawn spacecraft, scientists mapped areas rich in organic materials and found they were not located near cryovolcanic sites.
Ranjan Sarkar, a scientist involved in the study, pointed out that these organic deposits are rare and not linked to volcanic features, challenging the earlier belief that volcanoes were responsible for bringing organic materials to the surface.
Further analysis suggests that slow-moving asteroids from the outer asteroid belt could be the source of these organic compounds. Due to their low impact speeds, the heat generated during collisions is insufficient to destroy the organic molecules, allowing them to remain on Ceres' surface.
Martin Hoffmann, another researcher at MPS, highlighted that there is no evidence of volcanic or tectonic activity in the areas where these organic compounds are found. This supports the theory that the organic materials were delivered from space by asteroid impacts rather than from within the planet itself.
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Karnataka govt tables Rs 14,767 cr supplementary estimates in assembly
Bengaluru (PTI): The Karnataka government on Monday tabled the supplementary estimates in the assembly, totalling Rs 14,767 crore of additional expenditure for the current fiscal.
Tabled by Revenue Minister Krishna Byre Gowda on behalf of Chief Minister Siddaramaiah, supplementary estimates are additional expenditures incurred by the government over and above the budget provisions.
In the fiscal ending March, additional expenditures include Rs 147 crore on the Sadhana Samavesha to mark two years of the Congress government and Rs 223 crore for railway barricading to prevent human-elephant conflict.
As per the supplementary estimates, the government spent Rs 1.25 crore to purchase a Volvo XC90 for former Prime Minister H D Deve Gowda.
It also includes -- Rs 1,025 crore to clear various irrigation works bills, Rs 15 crore for helicopter and air travels by Governor, CM, ministers and other VIPs, Rs 110 crore towards scholarship and tuition fee reimbursement for minority students, Rs 15 crore for development of various temples, maths and trusts.
The government also spent Rs 1.4 crore to print a book comprising 'selected' speeches of Governor Thaawarchand Gehlot, Rs 50 lakh to clear pending electricity and water bills of ministers' residences, Rs 10 crore towards rehabilitation of families affected by landslides at Meppadi in Wayanad, Kerala.
Rs 5 crore each for Brahmin Development Board and Arya-Vysya Development Corporation, Rs 60 lakh to Supreme Court senior advocate Kapil Sibal for two appearances representing the government, Rs 5.13 crore towards bills from the Belagavi winter session of the legislature, Rs 5.5 crore towards pending bills from the 2019 and 2021 Assembly bypolls and the upcoming Davangere South and Bagalkot bypolls, are among the expenditures incurred.
