Concept
Obliquity
The tilt of a planet's axis to its orbit.
Earth's 23.4° obliquity gives us the seasons. Mars' obliquity varies wildly over time, driving long-term climate swings.
Overview
Earth's 23.4° obliquity gives us the seasons. Mars' obliquity varies wildly over time, driving long-term climate swings.
See also
The Habitable Zone
Where liquid water can exist on a planet's surface.
Perigee
The closest point in an Earth-centred orbit.
Apogee
The farthest point in an Earth-centred orbit.
Eccentric Orbit
A highly elongated elliptical orbit.
The Big Bang
How everything began, 13.8 billion years ago.
Black Holes
Regions where gravity stops light itself.