Launched as GRAIL A and GRAIL B in September 2011, the probes were renamed Ebb and Flow by schoolchildren in Montana. The probes operated in almost circular orbit near the lunar poles at an altitude of approximately 34 miles, until their mission came to an end in December 2012. The distance between the twin probes altered a bit as they soared over areas of lesser and greater gravity that were caused by visible topological features on the Moon's surface, such as impact craters and mountains--as well as by masses that were secreted beneath the lunar surface.
Moon in Earth (Taurus, Virgo or Capricorn) will be in their element when they are making money, adding to their resources or making their home cosy, comfortable or beautiful. They cannot just wish or believe, they need to have and to hold the tangible or to make progress in order to feel secure. They react in a grounded, steady and matter- of-fact manner, which can turn into stubbornness and a reluctance to change or let go. They are very much at home when working or being productive in their practical way.
This cycle has been appropriately named the 'dark moon'. The cycle from one dark moon to the next is called a lunation and an average lunation calculates at about 29 days, 12 hours, 44 minutes and 3 seconds (roughly) To be fair, it does deviate in relation to the moons erratic orbit patterns and is affected by the gravity conflict between the sun and the moon.