dust-cloud hypothesis

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• Cloud condensation nuclei — Aerosol pollution over Northern India and Bangladesh NASA Cloud condensation nuclei or CCNs (also known as cloud seeds) are small particles typically 0.2 µm, or 1/100 th the size of a cloud droplet [1]) about which cloud droplets coalesce. Water… …   Wikipedia

• Mineral dust — Dust Plumes off Western Africa. Mineral dust is a term used to indicate atmospheric aerosols originated from the suspension of minerals constituting the soil, being composed of various oxides and carbonates. Human activities lead to 30% of the… …   Wikipedia

• Controlled demolition hypothesis for the collapse of the World Trade Center — The controlled demolition hypothesis is a 9/11 conspiracy theory that claims the complete structural failure of the World Trade Center towers was not caused by the plane crash damage that occurred as part of the September 11, 2001 attacks, nor by …   Wikipedia

• Alvarez hypothesis — The Alvarez hypothesis is the theory that the mass extinction of the dinosaurs and many other living things was caused by the impact of a large asteroid on the Earth sixty five million years ago, called the Cretaceous Tertiary extinction event.… …   Wikipedia

• dark cloud — Synonyms and related words: Black Magellanic Cloud, Crab Nebula, angry clouds, black cat, black clouds, bright diffuse nebula, broken mirror, coalsack, dark nebula, diffuse nebula, dust cloud, gaseous nebula, gathering clouds, halcyon bird,… …   Moby Thesaurus

• Nebular hypothesis — Star formation Interstellar medium Molecular cloud …   Wikipedia

• Oort cloud — An artist s rendering of the Oort cloud and the Kuiper belt (inset). Sizes of individual objects have been exaggerated for visibility …   Wikipedia

• Cirrus cloud — A sky filled with many types of cirrus clouds Cirrus clouds (cloud classification symbol: Ci) are atmospheric clouds generally characterized by thin, wispy strands, giving them their name from the Latin word cirrus meaning a ringlet or curling… …   Wikipedia

• CLAW hypothesis — The CLAW hypothesis proposes a feedback loop that operates between ocean ecosystems and the Earth s climateCharlson, R. J., Lovelock, J. E., Andreae, M. O. and Warren, S. G. (1987). [http://www.nature.com/nature/journal/v326/n6114/abs/326655a0.htm… …   Wikipedia

• Gaia hypothesis — The study of planetary habitability is partly based upon extrapolation from knowledge of the Earth s conditions, as the Earth is the only planet currently known to harbour life. The Gaia hypothesis, also known as Gaia theory or Gaia principle,… …   Wikipedia

• Clathrate gun hypothesis — …   Wikipedia