Archive for maio 3rd, 2012

Quem És Tu? Perpetuador da Espécie Até a Extinção ou Quebrado Saltador Para o Buraco Negro do Cosmos?

quinta-feira, maio 3rd, 2012

Nascer, brincar, trabahar, estudar, trabalhar, casar, gerar cópias de si mesmo, trabalhar, envelhecer, morrer. Nascer, brincar, trabalhar,… morrer. Êste é o inevitável roteiro que é o micro-ciclo que tem compôsto a história da existência humana. Tem sentido algum inteligente nisto? Isto vai continuar até o dia que a Natureza mudar de maneira que não mais permite a vida humana aqui. Por outro lado, antes que a Natureza mude e sejamos extintos, podemos tentar mudar o roteiro, tentando se libertar dêste ciclo, saltando para a aventura no desconhecido céu estrelado, e talvez encontrando novos habitats que ultrapassem a extinção dêste. Eu tenho investido tudo na segunda opção, tanto que me recusei voluntáriamente a constituir essa familia nuclear e gerar filhos, pois fazendo isso não posso fazer a segunda opção. Na Matrix/DNA somos todos assim, um grito de rebeldia contra o determinismo estabelecido. Não queremos concencê-lo a trilhar nosso caminho, apenas informar que êsse caminho existe e existem pessoas transitando por êle.

Importante Sugestões Para Calcular e Testar Se a Terra Obedece a Lei da Galaxia Original Ou do Átomo Sistema Solar

quinta-feira, maio 3rd, 2012
lcrowell

Back in the 1990s I did research on the question of whether the orbit of the Earth increases it radius with time. Based on some numerical and perturbation calculations I performed I do think this happens, but it is not absolutely predictable. The gravitational influence of Jupiter is the main driving force for increasing the orbital radius. My analysis indicates the Earth 3.5 billion years ago was .85AU from the sun, compared to 1 AU today, and this would have increased the Earth’s solar irradiance by 35%. This would have substantially warmed the Earth given the solar output was 30% lower than today. The early Earth atmosphere was primarily nitrogen with about 10-20% CO_2. This would have increased the average temperature of the Earth from -30C to 0C. So if the Earth continues to evolve this way then in one billion years the Earth will be 1.05AU in radius. The solar output will be around 10% higher than today, and this motion will almost exactly cancel the increased brightness of the sun. So it is possible that life in a billion years might be doing just fine here

The open question is now the orbital radius can increase in such as way that the periodicity of the Earth’s orbit crosses the 1/11 resonance condition with that of Jupiter. Right now Earth has 1:11.85 ratio between orbital periodicities of Earth with Jupiter. This increase in orbital radius means crossing the resonant condition of 1:11 — a sticky mathematical problem. The orbits of planets tend to stay close to certain resonant conditions, where we are now near an 8:95 resonance ratio.

So if I were to run with this, in about a billion years Earth will reach the 1:11 resonance condition. So we may have a billion years until then. If Earth crosses that resonance threshold it would imply life could exist for a much longer time period. The resonance condition has the effect of amplifying small perturbations (chaos theory) so it acts a bit like a barrier, and some stochastic fluctuation has to kick Earth over the “hump.” Once across we are good for another billion years. So Earth may have a billion years and maybe up to 2 billion years before becoming overheated.

There are of course other mitigating circumstances. The UV breakup of water in the atmosphere and the absorption of water by tectonic subduction will decrease oceans over time. In about a billion years the oceans may only be 50% of the Earth’s surface. That will be a game changer. Also in 300 million years North America will crash into Asia by tectonic drift, which will recreate Pangea. Most of the Earth’s surface will become desert, putting a huge stress on life. The diversity of life might start to take a huge hit around that time.

The heating of the sun will start to outpace any orbit drift of the Earth around a billion years from now. So even with the orbital corrections it is likely that by a billion year in the future life will start to become pretty tough. As a result if my scenario is correct Earth might be compared to a 50-60 year old person approaching retirement, but is still in a reasonable degree of health and productivity. It also should be pointed out that even if the oceans boil off in a billion years that prokaryotic life may persist for a considerable time beyond then. There might be microbial life on Earth in rock layers two or even three billion years from now.

Read more: http://www.universetoday.com/95183/is-earth-alive-scientists-seek-sulfur-for-an-answer/#ixzz1wkIb8J3b