Recently, scientists gathered data about Venus by bouncing radio waves off the planet. The study measured the tilt of the Venusian axis and size of the planet's center, or core. It also studied the planet turning.

All this data is giving a deeper understanding of the strange planet, sometimes called Earth's “evil twin.”

It was already known that Venus has the longest day. The time the planet takes for one full turn, or rotation, on its axis is longer than any other planet in our solar system. However, some earlier estimates were not completely correct.