Climate change creates wobbles in Earth’s spin axis

11 April 2016 Astronomy Now

Earth does not always spin on an axis running through its poles. Instead, it wobbles irregularly over time, currently drifting toward the British Isles at 17cm per year. These wobbles don’t affect our daily life, but they must be taken into account to get accurate results from GPS, satellites and observatories on the ground.


Gully patterns document Martian climate cycles

29 January 2015 Astronomy Now

A new analysis of gullies carved into Martian impact craters suggests the Red Planet has undergone several ice ages in the last several million years. The driver of these climate swings is likely the planet’s wobbly axis tilt.