The line of apsides rotates counterclockwise once in 8.9 years, due to the influence of the sun. The phase of the moon is determined by the relative positions of the two balls: both together at new ...

The next full moon is Saturday, Aug. 9, and is sometimes called the Sturgeon Moon. It gets that name from when "The Great ...

The dark skies during a new moon provide ideal conditions for spotting skywatching targets that would otherwise be outshined by moonlight. The next new moon will occur on Saturday Aug. 23 at 2:06 ...