Outer Space Matty's Galaxy

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November 16, 2020

https://twitter.com/elonmusk/status/1328124552459603968

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Mineralogy

March 10, 2021

Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Silicates, oxides, sulfates, sulfides, carbonates, native elements, and halides are all major mineral groups. Becoming a mineralogist requires at a minimum a college degree and often postgraduate work. Since most mineralogists work in research or teaching a PhD is the commonest degree that is required. To prepare for this you need to take a college preparatory track in high school. Georg Agricola a name for German scientist Georg Agricola. A career in geology is well compensated, with a variety of different career paths and job titles. The main types of careers for geologists are in academia, working for the government (USGS), environmental consulting, oil and gas industry, or mining industry.

Magnetism

March 15, 2021

Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism. There are six basic types of magnetization: (1) diamagnetism, (2) paramagnetism, (3) ferromagnetism, (4) antiferromagnetism, (5) ferrimagnetism, and (6) superparamagnetism. Diamagnetism arises from the orbiting electrons surrounding each atomic nucleus. Magnets don't need gravity or air. Instead, their power comes from the electromagnetic field they generate all by themselves. One class of magnets, called electromagnets, does need electricity to work. Magnets are surrounded by an invisible magnetic field that is made by the movement of electrons, the subatomic particles that circle the nucleus of an atom. The hyperactivity of these electrons gives magnets t...