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An object with an axial tilt up to 90 degrees is rotating in the same direction as its primary. An object with an axial tilt of exactly 90 degrees, has a perpendicular rotation that is neither prograde nor retrograde. An object with an axial tilt between 90 degrees and 180 degrees is rotating in the opposite direction to its orbital direction.
Venus may have had liquid surface water early in its history with a habitable environment, [24] [25] before a runaway greenhouse effect evaporated any water and turned Venus into its present state. [26] [27] [28] The rotation of Venus has been slowed and turned against its orbital direction by the currents and drag of its atmosphere. [29]
Representation of Venus (yellow) and Earth (blue) circling around the Sun. Venus and its rotation in respect to its revolution. Venus has an orbit with a semi-major axis of 0.723 au (108,200,000 km; 67,200,000 mi), and an eccentricity of 0.007. [1] [2] The low eccentricity and comparatively small size of its orbit give Venus the least range in ...
Just next door, cosmologically speaking, is a planet almost exactly like Earth. It’s about the same size, is made of about the same stuff and formed around the same star. To an alien astronomer ...
The direction of rotation exhibited by most objects in the solar system (including Sun and Earth) is counterclockwise. Venus rotates clockwise, and Uranus has been knocked on its side and rotates almost perpendicular to the rest of the Solar System.
Since the pitch of music reproduction depends on rotation speed, these models have regular markings on the side of the rotating platter. The periodicity of these markings is calibrated in such a way that, under local mains frequency (50 Hz or 60 Hz), when the rotation has exactly the desired speed of 33 + 1/3 rpm, they appear to be static.
An animation explaining why the planet Mercury may appear to move "backwards", or retrograde across Earth's sky. Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point.
Venus is similar in size and distance from the sun when compared with Earth, and some researchers believe the planet might have even had an Earth-like climate at some point.