What is Venus's axial tilt, measured in degrees?

Venus’s axial tilt, measured in degrees, is 177.36 degrees.

This unusually large-looking angle reflects Venus’s retrograde rotation: the planet spins in the opposite direction to most planets, including Earth. Astronomers can also describe the same orientation as an obliquity of about 2.64 degrees with retrograde rotation. Thus, 177.36 degrees and 2.64 degrees are not competing measurements; they use different conventions for expressing the same physical orientation.

Venus rotates once relative to the distant stars in about 243 Earth days, longer than its 224.7-day trip around the Sun. Because the rotation is retrograde, the Sun would rise in the west and set in the east if Venus’s opaque clouds allowed a surface observer to see it.

Its small effective tilt helps explain why Venus has weak seasonal contrasts. However, the planet’s thick carbon-dioxide atmosphere produces an intense greenhouse effect, keeping surface temperatures extremely high. Venus’s axial tilt is therefore not the cause of its heat.