
Dark Matter 'hairs' Around Earth

by Science Photo Library
Title
Dark Matter 'hairs' Around Earth
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Dark matter 'hairs' around Earth, illustration. The filaments of dark matter, called 'hairs', were proposed in a study in the Astrophysical Journal by Gary Prezeau of NASA's Jet Propulsion Laboratory. A 'hair' is created when a stream of dark matter particles goes through the planet. According to simulations, the hair is densest at a point called the 'root'. When particles of a dark matter stream pass through the core of Earth, they form a hair whose root has a particle density about a billion times greater than average. The hairs in this illustration are not to scale. Simulations show that the roots of such hairs can be 1 million kilometres from Earth, while Earth's radius is only about 6400 kilometres. Image published in 2015.
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October 27th, 2019
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