Explosions of small Spacewatch objects in the Earth's atmosphere

Article Abstract:

The probability and estimated velocity of collisions between the Earth and Spacewatch objects measuring 50 m with kinetic energy lower than 10 megatonnes were measured using Opik's equation. The Opik equation accounts for the Earth's orbital eccentricity but do not apply for other earth-crossing objects whose inclinations are too low. Results indicate that asteroids or comets with energy levels less than 2 megatonnes do not pose any hazards to the earth, except for rare iron objects. The study concludes that the high level of earth-crossing objects observed by Spacewatch do not represent potential terrestrial hazards.

Research, Evaluation, Asteroids, Comets, Geophysical research, Collisions (Physics), Interstellar matter, Interstellar medium, Orbits (Astrophysics)

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Life beyond Mars

Article Abstract:

Reports and results from astronomical studies support the premise that extraterrestrial life in Mars or beyond is possible. The reports on life possibility on Mars fail to show substantial evidence and depend on speculation. The studies conducted at Capri regarding the formation of extraterrestrial organics and the Drake equation on star formation and the evolution of life support speculations on extraterrestrial life.

Mars (Planet), Life on other planets, Extraterrestrial life

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Energy for microbial life on Europe: A radiation-driven ecosystem on Jupiter's moon is not beyond the bounds of possibility

Article Abstract:

It is shown that disequilibrium chemistry in the ocean's ice cover, fuelled by changed particles accelerated in Jupiter's magnetosphere, could produce sufficient organic and oxidant molecules to fuel a substantial European biosphere. A particular radiation-drive ecosystem is plausible, based on current knowledge of Europa.

Europa (Satellite)

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