Strangely, âposhliâ (which means âletâs goâ or âletâs head outâ in Russian) is actually the past tense of the verb meaning âTo head off on foot.â In other words, âposhliâ literally means, âWe (or they) headed off on foot.â How can a word which is in the past tense indicate the desire to head off somewhere now?
The Hill sphere, or gravitational sphere of influence, of Earth is about 1.5 Gm or 1,500,000 km in radius. This is the maximum distance at which the Earth's gravitational influence is stronger than the more distant Sun and planets.
Just for comparison, thatâs 3.5 times as much surface area as Mars. The mass of Earth is 5.97 x 10 24 kg. Here that is written out: 5,970,000,000,000,000,000,000,000 kg. Yeah, thatâs a really big number. And yet, itâs only 0.3% the mass of Jupiter (and Jupiter is mostly lightweight hydrogen).