"Horizontal" isn't really the correct "scientific" way to describe it, but the answer is Uranus.
Uranus.
Uranus is the planet that is almost tilted 90 degrees on its axis. Its extreme axial tilt results in the planet's poles being almost in line with its orbital plane, causing highly unusual seasons and weather patterns on Uranus.
Uranus is the inner planet of our solar system with a tilted axis. Its axis is tilted at approximately 98 degrees, causing it to rotate almost parallel to its orbital plane, giving it extreme seasonal variations.
Uranus is the planet that spins on quite a significant tilt which makes its axis almost horizontal compared to its orbit around the Sun. This unique characteristic gives it extreme seasons where each pole faces the Sun for about 42 years at a time, causing dramatic temperature changes.
Uranus is the planet that is tilted on its axis more than any other planet in our solar system. Its axis is tilted at an angle of about 98 degrees, causing it to essentially roll on its side as it orbits the Sun.
Uranus
Uranus.
Uranus.
Uranus.
Uranus is the planet that is almost tilted 90 degrees on its axis. Its extreme axial tilt results in the planet's poles being almost in line with its orbital plane, causing highly unusual seasons and weather patterns on Uranus.
Uranus is the inner planet of our solar system with a tilted axis. Its axis is tilted at approximately 98 degrees, causing it to rotate almost parallel to its orbital plane, giving it extreme seasonal variations.
Uranus is tilted on its side at almost 90 degress.
They are all tilted.
Earth's axis is tilted to about 11 degrees from the vertical.
Uranus is the planet that spins on quite a significant tilt which makes its axis almost horizontal compared to its orbit around the Sun. This unique characteristic gives it extreme seasons where each pole faces the Sun for about 42 years at a time, causing dramatic temperature changes.
Earth
The planet Uranus has a tilted axis