Source: Helium.com February 18, 2011
The aptly named Grand Cooling is exactly what it implies: the sun is going to cool. That cooling will also cool off the Earth. It will last from 30 to 50 years.
What exactly does global cooling mean? Well for one, Al Gore was sure wrong! The Earth isn’t going to warm, it’s going to get colder. Much colder. So cold a little or full-blown Ice Age will ensue. As a matter of fact, some scientists claim we’re already in the early stages of an Ice Age.
Dutch Professor Cees de Jager, a prominent astronomer and solar expert, forcefully asserts that we the world is indeed entering for a long period of very low solar activity. The professor and his colleagues are certain Earth is heading for a “long Grand Minimum”—defined as either a Solar Wolf-Gleissberg or a Maunder Minimum—”not shorter than a century.” His 2010 paper, “The forthcoming Grand Minimum of solar activity,” outlined the extended period of time that the diminished solar radiation would affect the Earth.