Assuming the clouds open wide enough, (admittedly, that's an optimistic assumption), a total eclipse of the moon will be visible tonight; the first total lunar eclipse in almost the last three years.

And, tomorrow (Tuesday, December 21) is the Winter Solstice, the first time there's been overlap between the two events in the last 456 years, according to the Montreal Gazette.

According to AZCentral, the eclipse will begin tonight at 10:29 pm, but it'll take about half an hour to see any changes. But, hang in there, because by midnight, the eclipse will be obvious. To get the full effect of the eclipse, you'll want to be watching from 12:41 - 1:53 am. That's when the moon will be the darkest, completely covered by the Earth's shadow.

This eclipse will be viewable with the naked eye, but for more details, a telescope or a set of binoculars will be helpful.

For more information on this Solstice Lunar Eclipse, check out the NASA website, which is crammed full of information about the event, including two live web chats:

http://www.nasa.gov/topics/solarsystem/features/watchtheskies/index.html