11. After completing 86 communications sessions and 52 orbits of the Moon at various inclinations and altitudes, it began its descent. 12. Once the orbit of the Moon closes to a distance of, it will cross the Earth's Roche limit. 13. Scheduled for launching next September, the spacecraft is to go into an orbit of the Moon that repeatedly crosses both poles. 14. These occur with monthly periodicities and are related to tidal stresses caused by the eccentric orbit of the Moon about the Earth. 15. Because the orbit of the Moon is tilted only 5?from the ecliptic, the interior of this crater lies in perpetual darkness. 16. As they began their 74th and final orbit of the Moon , the crew positioned the spacecraft for the correct attitude for release. 17. Due to tidal acceleration, the orbit of the Moon around the Earth becomes about 2.2 cm more distant each year. 18. The orbits of the moon and stars are sufficiently inclined that the inhabitants of the planet have seldom seen an eclipse or occultation. 19. With its apogee as far as the orbit of the Moon , Spektr-R could be considered a deep-space mission. 20. We do have an article on the orbit of the Moon . talk ) 17 : 46, 27 March 2008 ( UTC)
