Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course. When ...

This year, during the heat of summer, when temperatures in New York surpassed 90°F, the 22 solar panels on the roof of my house were doing absolutely nothing. This is not something I learned until ...