Spyke

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Do satellites have different levels for direction they are traveling?

Orbits are circles or ovals, and the satellite must always be moving to stay in orbit. But the time to go around depends on the distance, so there is a distance where the satellite takes 24 hours to go around, which matches the Earth's rotation, which is geosynchronous. A subset of these is called geostationary, when the orbit is a circle around the equator, so it stays in the same spot of the sky. (Then we can aim a ground antenna just once and don't have to adjust it.) Satellites at this distance add 1/4 second delay to any signal because of light speed. This orbit is very tight, since it can not vary in altitude by more than a few hundred meters. (More than that would cause them to drift east or west out of the assigned spot.) There are a limited number of "slots" in this orbit to keep the satellites safely separated and to prevent their signals from overlapping. Most of these are used for communication, especially TV. A few are for weather, as they can watch an entire hemisphere constantly.

Other satellites operate in a lower orbit. Here the orbital period can be as low as 90 minutes. Most of these orbits are inclined so they pass over most of the earth instead of just the equator. The orbit (circle) stays in one angle while the earth rotates underneath. Satellites here get better images because they are closer to Earth, but take a day (or more) to see everything. They also have greatly reduced light speed delays. These orbits eventually decay because of tiny amounts of air at that altitude.

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Well I'm out of ideas

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If Russia stops fighting, the war ends. If Ukraine stops fighting, Ukraine ends. And Russia is more likely to try again in another neighbor. Like they have multiple times already.

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So easy ! 🤷

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The yellow hash isn't protecting anything, such as a handicap space or a walkway. It's just saying this one isn't a parking spot because of the big pole in the middle.

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Why is it so hard to create atoms from other atoms?

Fun fact: pretty much all the helium we have access to comes from alpha decay of heavier atoms, such as natural uranium. An alpha radiation particle is just a "naked" and fast moving helium nucleus. (Missing the electrons.) When this happens deep in the earth, it quickly runs into something, stops moving, and picks up some electrons to make it helium, which can accumulate in certain rocks.

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To this day, I don't know what it was meant for

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And how would they program that keyboard? Why should they need to buy extra hardware? Instead, it's offered on every copy of Windows, and activated in a standard way that doesn't require multiple simultaneous keys. They can walk up to a library shared computer, or something at work, and start using it.

It's annoying when it gets in the way of gaming, but face it: pressing shift 5 times is not something you do accidentally in most apps outside of gaming.

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Dodge RAM driver kills a cyclist. Media calls it a "bike crash".

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In some rural areas, the "highway" is literally the only way to get from point A to point B. Many businesses and homes are directly on the highway. It's not the same as Interstate 5 which is a few miles west of there.

Unlike a freeway, which has bigger speed limits, a highway is just any road designed for high traffic. It still has intersections, traffic lights, and driveways into properties.