X-Ray Observations Indicate That Around the Milky Way There May

question 94

Multiple Choice

X-ray observations indicate that around the Milky Way there may be an extended halo of

• A) hot and diffuse gas at 2 million K, similar to that in the solar corona.
• B) cold and dense gas where new stars form abundantly.
• C) cosmic rays captured from other galaxies.
• D) ions accelerated by strong magnetic fields.
• E) gas heated by the very active supermassive black hole at the center.

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Definitions:

Silicon Tetrahedron

A structural unit in silicate minerals, consisting of a silicon atom surrounded by four oxygen atoms in a tetrahedral arrangement.

Silicate Minerals

minerals that contain silicon and oxygen, often forming the majority of the Earth's crust.

Halides

a class of minerals that are compounds of one or more halogen ions (fluoride, chloride, bromide, iodide) and an element.

Element Cl

Chlorine, a reactive halogen element found in the periodic table with the symbol Cl, used in various industrial and chemical processes.