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.
He did this by relating the light-year to the astronomical unit â the Earth-sun distance. One astronomical unit equals about 150 million kilometers (93 million miles). Another way of looking at it: the astronomical unit is a bit more than 8 light-minutes in distance.Quite by coincidence, the number of astronomical units in one light-year and the number of inches in one mile are virtually the same.tars other than our sun are so far distant that astronomers refer to their distances not in terms of kilometers or miles â but in light-years. Light is the fastest-moving stuff in the universe. It travels at an incredible 300,000 kilometers (186,000 miles) per second. Thatâs very fast.