As covered in this article about orchids care and light, Cymbidiums need medium to bright light intensity in order to thrive, and do best with as much light as possible. If your Cymbidium orchid is receiving the optimal amount of light the leaves will be a yellow-green color.Too much light will cause the leaves to become yellow, and too little light will cause the leaves to become a very dark green color.ertilizer Requirements. When the Cymbidium is in active growth, you will want to fertilize regularly. An orchid fertilizer solution of (20-20-20) is recommended. During the winter months, applying fertilizer once a month is sufficient.
1. Astronomical Unit-a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers). AU. astronomy unit-a linear unit used for astronomical distances.
Epoch (astronomy) From Wikipedia, the free encyclopedia. In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.