Tag: Earth
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The Earth Is a Bit Bumpy
Last Friday I shared an xkcd post about the relative smoothness of the Earth. This week he posted an illustration but a slightly different scale. You can see more of Earth’s jagged edges. Gotta love the Star Trek reference. I’m betting he used the length of the Kelvin timeline Enterprise, which I personally dislike, as…
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The Earth Is Actually Quite Smooth
At scale. Not quite as smooth as a billiards ball, as is often claimed. But still, with the majority of the Earth’s surface covered by water, the highest mountains of Everest and K2 make for mere fractions of differences in height relative to the Earth’s size. But that did not stop xkcd from making a…
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Where is the North Pole?
We have two North Poles. The most commonly known is the geographic north pole that sits at the top of the world. We also have the magnetic north pole, which is where your compass points when you are lost in the woods. But, the magnetic north pole is not static and in fact moves. (In…
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Quasi-satellite Asteroid Orbits
Scientists discovered Earth has a new quasi-satellite. It is an asteroid, and it does not orbit the Earth. But, because of the relationship between its orbit and Earth’s around the sun, it is involved in what NASA described as a dance with Earth. This is not Earth’s only dance partner, however, as we interact with…
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Supermoon Lunar Eclipse
Last night we experienced a total lunar eclipse here in Chicago. Unfortunately, significant cloud cover meant that much of the event went unseen. That was unfortunate, because eclipses are fantastic. To explain it we have this piece from the BBC. And for those were either unable to see it or did not know about it,…