Terrence A. Murray. Cincinnati, Ohio. When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about ...

As summer settles in and temperatures climb in the Northern Hemisphere, it’s impossible to forget just how much the sun ...

The Sun's expansion into a red giant will engulf the inner planets, drastically increasing temperatures in the outer solar system. The habitable zone will expand to 10-50 AU, potentially making ...