https://xkcd.com/2908

Alt text:

Astronomers are a little unsure of the applicability of this index, but NASA’s Planetary Protection Officer is all in favor.

89 points
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One of my all-time favourite facts is that solar eclipses are actually a very rare thing to happen in space. There is no reason why but our moon just happens to be the right size/distance to have this happen.

I’ve never seen one in person, but the next one is on the 8th of April crossing Mexico and the US. If you have the chance and are able, go check it out, if only to gloat on an internet stranger longing for his first total eclipse.

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17 points

Saw one when I was 9 like 20 years ago. Still one of the coolest things I’ve ever seen. Definitely worth a trip if you can.

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13 points

And keep in mind that the difference between a total eclipse and a partial eclipse is massive. It’s worth it to find a spot that is in the line of totality.

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7 points

Yep, total eclipse is metal as fuck

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7 points

One passed over my area while I was at university, and the professor whose class we were meant to be in just said the day beforehand that he wasn’t even going to bother scheduling anything for the first hour because he didn’t expect anyone to be in. There’s a famous hill-top cemetery in the city, and sure enough I saw basically all of my classmates there too

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3 points

There’s a famous hill-top cemetery in the city, and sure enough I saw basically all of my classmates there too

That was an unexpected dark turn. Glad you live to tell their story!

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10 points

As Moon is slowly moving away, at some point in the future there will be no more full eclipse. And there is 2 full eclipse by year !

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-5 points

Nah, it’s just a moving away, then moving closer again thing over millions of years. Balance between gravity and centrifugal force.

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9 points

This is incorrect. The moon is moving away from the earth and will stop. At some point in the future the tidal forces will balance out and the earth-luna system will be tidally locked. From that point on they will remain locked in orbit neither moving away or towards one another unless some other large gravitational force perturbs them (e.g. an extra solar planet wandering through the solar system and passing by earth-luna).

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7 points

Ok I read somewhere it would reach it’s farthest orbit (29d and half) and stays there then.

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2 points

I’m gonna be dead center for it here in Ohio, so excited. Got my welding helmet ready to watch it and the day off.

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1 point

Fuck yes, enjoy bud. I’ve read people not using high enough rated welding goggles and getting eye damage though. I’d stay on the safe side and get appropriate solar eclipse glasses. You’ll be looking directly at the sun for several minutes after all.

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2 points

I have shade 14 capable welding helmets, I’m good. I did have to look that up to be sure though. You are right apparently to be worried.

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60 points

Interesting mix of kilometers and inches…

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35 points

As a Canadian, this just seems normal to me.

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22 points

When do we get to start using kiloinches?

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10 points

I heard Everest is actually exactly 348 KI, they just thought 348.324 KI sounded more accurate

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1 point

I’ve heard that in feet they originally measured it to 29000 exactly. But they added 2 feet so people didn’t think they were estimating the height.

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29 points
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Putting on our moon armour could solve a lot of problems. It’s not my most favourite solution though.

PS: Gonggong?!
Edit: dwarf planet. Discovered in 2007 and named after a god in the chinese mythology:

Gonggong was ashamed that he lost the fight with Zhurong, the Chinese god of fire, to claim the throne of Heaven. In a fit of rage, he smashed his head against Buzhou Mountain, one of eight pillars holding up the sky, greatly damaging it and causing the sky to tilt towards the northwest and the Earth to shift to the southeast, which caused great floods and suffering.

🤷‍♀️

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8 points

Sounds like someone who didn’t learn healthy coping mechanisms.

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3 points
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Ah, it is Chinese, interesting. I’m guessing it’s not the gonggong in 公共汽车, because that’s a bus.

What, it almost literally is. It’s 共工, like “work together”… but not like, go to work together (on the bus).

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4 points
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umm.

These characters have multiple entirely different meanings. How does one find out what the supposed meaning is? Or is it up to the reader to decide?

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6 points
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Context, apparently the word “set” has 430 meanings in the Oxford dictionary. So there’s a lot of ambiguity. It’s very confusing but I think we give as good as we get in that regard.

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1 point

The old guy from everything everywhere all at once

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25 points

Not bad, Jupiter. Considering you have 120x the surface area of earth, that’s a lot of moons.

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22 points

See Marco Inaros was just trying to give those inners some extra planet armor.

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