Albert Einstein was married to his distant cousin, Elsa Einstein.
100 Mind-Blowing Distant Facts
Our solar system has a wall. The heliopause – the region of space in which solar wind isn’t hot enough to push back the wind of particles coming from distant stars – is often considered the “boundary wall” of the Solar System and interstellar space.
Loofahs are vegetables. If you look at a loofah, you might think it came from a dried sea creature. However, this scrubbing sponge is made from a vegetable. Loofahs are made from the fibrous flesh of the mature Luffa aegyptiaca and L. cyclindrica gourd. They’re distant relatives of melons and squash. Before reaching maturity, luffa is also edible.
There are two ways to think of the length of a day on Earth. Though you probably learned that one day on Earth is 24 hours, it takes the planet 23 hours, 56 minutes, and 4.0916 seconds to rotate on its axis. This is the difference between a solar day and a sidereal day—a solar day is 24 hours, whereas a sidereal day is roughly four minutes shorter. We measure solar time based on the sun’s position in the sky; a sidereal day is measured based on the location of the “fixed” stars. In other words, a sidereal day is the time it takes for a distant star or constellation to appear on the same meridian.