The timing of the cycles was apparently set by minor changes in sunlight caused by slow variations of the Earth's orbit. (history.aip.org)
Kane and his team also observed that unlike Earth, which experiences climatic changes such as an ice age because of slow variations in its orbit around the sun, Wolf 1061c's orbit changes at a much faster rate, which could mean the climate there could be quite chaotic. (sciencedaily.com)
Thus, there are sufficient studies, both theoretical and phenomenological, confirming our results that for slower variations the climate sensitivity is stronger. (realclimate.org)