Category: Cosmos
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Earth’s rust…
To the surprise of many planetary scientists, the oxidized iron mineral hematite has been discovered at high latitudes on the Moon, according to a study published in Science Advances led by Shuai Li. "Our hypothesis is that lunar hematite is formed through oxidation of lunar surface iron by the oxygen from the Earth's upper atmosphere…
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The bar mystery…
The majority of spiral galaxies, like our home the Milky Way, host a large bar-like structure of stars in their canter. Knowledge of the true bar size and rotational speed is crucial for understanding how galaxies form and evolve. However our galaxy's bar size and rotational speed have been strongly contested in the last 5…
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Rough.
Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that…
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Coincidences. Noise. Systems. Predictions.
When we predict future climate, it is important to understand the climate of the past. We do. Mostly. Some details are still debatable. An example of that are the periodicities of ice ages - that is, how ice ages come and go. This is described in a theory developed by amongst others the astronomer Milankovitch…
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