Answer: It sounds as though you've been very successful with your orchid and are providing all of the plant's light, humidity and air temperature requirements. Orchids grow from a pseudobulb, which is a storage organ for the plant. As the plant matures it develops additional pseudobulbs. If your plant has more than one such bulb, you can divide it between the bulbs, making two plants. Make sure that each division has at least three shoots, and be sure to stake each division up when you transplant.
By the way, it's not unusual for orchids to grow roots above the soil surface. These aerial roots should be left to grow as they wish.
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