The corona, the Sun's outermost layer, stretches millions of kilometres into space and is mysteriously hotter than the underlying photosphere, a phenomenon known as the 'coronal heating problem.' ...

Monday starts cool and comfy with morning lows in the mid 40s, then warms nicely to the mid 70s under sunny skies—a beautiful day. Tuesday will be a touch warmer, and the heat really kicks in by ...

Highs will be similar to yesterday, reaching the 70s and low 80s. Rain will develop tonight, probably after midnight in Boston. Plan on a period of rain through Thursday morning. Tomorrow afternoon ...