All three of orbital cycles — called Milankovitch cycles — impact African climate on long geologic ... the Earth has its closest pass to the Sun (perihelion) — the so-called precession ...

So it was with some fanfare that they recently announced that the sun had transitioned into Solar Cycle 25. But what exactly does that mean? Does the Sun’s changing face make much difference to ...

By historical definition, Solar Cycle 1 occurred between 1755 and 1766, placing the sun's current cycle in Solar ... to power grids in Sweden and South Africa. With heightened solar activity ...