revolutions of the moon.
The period of movement of the Moon around the Earth can be seen in different ways: 1 .-
sidereal month: it is the time between two consecutive steps of the Moon by the hour circle of a star seen from Earth. Its duration is 27 days, 7 hours, 43 minutes and 11.6 seconds. It matters little astronomy and its value is calculated as the semi-major axis of the orbit. 2 .- synodic
Month: The time elapsed between two similar positions of the Moon and the Sun, ie between two phases of the moon. Its duration is 29 days, 12 hours, 44 minutes and 2.9 seconds and deconomia lunation. 3 .- Month
tropics is the time between two consecutive steps of the Moon by the hour circle of Aries point. Its duration is 27 days, 7 hours, 43 minutes, 4.7 seconds. 4 .- anomalistic
Month: is the time between two consecutive steps of the Moon perigee. Its duration is 27 days, 13 hours, 18 minutes, 33.2 seconds. 5 .- draconítico
Month: is the time between two consecutive steps of the Moon by the ascending node of its orbit. Its duration is 27 days, 5 hours, 5 minutes, 35.8 seconds.
The moon has a rotation in the forward direction around its axis, and time spent in a rotation is the same as its sidereal revolution. The rotation length is equal to what it takes to travel its orbit around the Earth, so the Moon always presents the same face to Earth except for slight variations due to librations.
0 comments:
Post a Comment