News and Views: Blowing bubbles that last almost forever; Earth's inner core is solid: official

Physics – Geophysics

Scientific paper

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Scientific paper

Massive young galaxies often display filamentary emission-line structures, and NGC1275 is no exception. But this active galaxy is close enough for the Hubble Space Telescope to pick out the delicate structure of the filaments.
Earth's layered internal structure has been established for some 70 years, on the basis of the reflection and refraction of seismic waves originating in earthquakes. But the innermost part of the Earth, the core, has been surmised to be solid, without clinching seismic evidence, until now.

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