Discover the Sun’s incredible heat, its layers, and what fuels it. Explore ExtremeTech’s in-depth article and get closer to ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun ... inner core is the outer core, a shell of ...

The Solar Orbiter mission has captured the highest-resolution views of the sun’s surface to date, showcasing massive sunspots ...