地球自转轴相对于公转平面的倾斜（倾角，Obliquity）变化会导致季节性差异，周期约为 4.1 万年（kyr），并强烈影响高纬度地区夏季接收的总能量。 自转轴（以及轨道本身）的进动（岁差，Precession）会使至日相对于日地距离的时间发生变化，周期约为 2.1 万年。

After the formation of Saturn, some dynamical mechanism must therefore have tilted Saturn up to its current obliquity of 26.7°. This event is traditionally thought to have happened more than 4 Gyr ago ...

The degree to which debris-covered glaciers record past environmental conditions is debated. Here, the authors show that obliquity-paced variations in solar radiation over the past ∼220 ka are ...

Obliquity versus Goal settingObliquity is a philosophical term meaning the act of meeting a goal through indirect, rather than direct means. In the simplest terms, the theory of obliquity states that ...

Solar Obliquity Induced by Planet NineThe six-degree obliquity of the sun suggests that either an asymmetry was present in the solar system’s formation environment, or an external torque has ...

Following our review of economist John Kay’s 2003 book The Truth About Markets last week, now we’re looking at his latest book, Obliquity.Kay recently gave the keynote speech at the Association of ...

Obliquity, By John Kay Why an off-target life will hit the spot Reviewed, Diane Coyle Friday 30 April 2010 00:00 BST 0 Comments ...