What is Mars' axial tilt in degrees?

Mars' axial tilt is 25.19 degrees. This tilt is the angle between Mars's rotational axis and a line perpendicular to its orbital plane, and it is close to Earth's 23.44-degree tilt.

That similarity gives Mars familiar seasons. As Mars travels around the Sun, its northern and southern hemispheres alternately lean toward sunlight, producing spring, summer, autumn, and winter. However, Martian seasons last nearly twice as long because Mars takes about 687 Earth days to orbit the Sun.

Mars's tilt has not always been stable. Gravitational interactions, especially with Jupiter, allow the planet's axial orientation to change over very long geological periods. Scientists think these variations have influenced the planet's climate and the distribution of ice at its poles.

A common mix-up is confusing axial tilt with orbital inclination. Mars's axial tilt is 25.19 degrees, while its orbit is inclined only about 1.85 degrees relative to Earth's orbital plane. Earth's tilt, often rounded to 23.5 degrees, is another nearby figure that can make this question tricky.