Venus is the only planet in the Solar System where a day ... | funfact.wiki | funfact.wiki
Venus is the only planet in the Solar System where a day is longer than a year. It takes about 243 Earth days to spin once on its axis, but only 225 days to orbit the Sun. It also spins backward, so the Sun rises in the west and sets in the east.
The point farthest from Earth's centre isn't Everest but Ecuador's Chimborazo. Earth's spin bulges the equator, pushing sea level there ~22 km farther out than at the poles. Although Chimborazo stands 2,585 m lower than Everest, its summit sits 2.1 km farther from the centre.
Earth reaches its farthest point from the Sun, aphelion, in early July—the Northern Hemisphere's summer. At ~152 million km, it is 5 million km farther than in January. Seasons come from axial tilt, not distance: Earth is farthest from the Sun in midsummer.
Earth's closest planet on average isn't Venus but Mercury. Bigger orbits spend longer on the far side of the Sun, so average distance grows. Mercury's tiny orbit keeps it near every planet. Earth–Mercury averages 1.04 AU, Earth–Venus 1.14 AU. The "Whirly Dirly Corollary."
Earth has 365 days in a year, but actually rotates 366 times. The extra rotation comes from its orbit around the Sun — an example of the coin rotation paradox.
Saturn has the lowest density of any planet in the solar system—so low it would float, given a big enough ocean. Its average density is 0.687 g/cm³, about 30% below water's. Made of hydrogen and helium, the lightest elements, it holds little mass for its volume.