If the sky is clear tonight, you'll have a good chance to see a blue moon. Or not.

      According to the now-accepted definition, blue moons occur whenever there are two full moons in the same month.

   The last full moon was June 1. Today is June 30, and the moon will be 99.7 full. Moonrise tonight is just after 9 p.m. Hence is is a blue moon.

   Except the definition got botched by an astronomy magazine more than 60 years ago.

  If you Google "definition of blue moon," you'll get a better definition.

  Or you can just head outside tonight and enjoy the moonlight and moon shadows.

   By the way, Sunday's night moon will be virtually full as well (99.4%).  Moonrise is around 9:50 p.m.

    Even though it apparently doesn't qualify as a full moon, it should be dandy as well, and a great way to start July.