Lunar eclipse - wikipedia, the free encyclopedia, The timing of total lunar eclipses are determined by its contacts: p1 (first contact): beginning of the penumbral eclipse. the earth's penumbra touches the moon's.
Menstrual cycle - wikipedia, the free encyclopedia, The menstrual cycle is the cycle of natural changes that occurs in the uterus and ovary as an essential part of makingual reproduction possible..
Astro bob | celestial happenings you can see from your own, Have you noticed something missing lately? venus has been absent from view since late last summer. we last saw it struggling against the solar glare at dawn..