Josh Hopkins

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Josh Hopkins

Josh Hopkins

@SpaceJosh

Rocket geek, orbits nerd, electric car driver, history buff, technical writer. Opinions my own. May commit puns. Also found on LinkedIn and Bluesky.

Katılım Şubat 2014
1.2K Takip Edilen1.8K Takipçiler
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Josh Hopkins
Josh Hopkins@SpaceJosh·
A person born in China at the end of WWII saw China's power rise as its working age population tripled in their lifetime. But now it has plateaued. A person born today will see that growth reverse. China's working age population will drop by 1 million per month for a long time.
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Jonathan McDowell
Jonathan McDowell@planet4589·
Artemis 2 was the furthest human voyage from Earth. Per the final JPL Horizons trajectory I estimate the max distance from the geocenter was 413145 km at 2304 UTC Apr 6 (about 4 km less and 1 min later than PAO's report at the time). But (1 / n ).....
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Josh Hopkins
Josh Hopkins@SpaceJosh·
What?! Alea iacta est was in Greek?!
liontender@lion_tender

@AdsoOfBelk Wow -- today I learned that Caesar is attested to have said this in Greek, not Latin, and that what he said is translated most directly as "let the die be cast" versus the meaning of "Alea iacta est". Thanks, I had no idea about this.

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Kendric Tonn
Kendric Tonn@kendrictonn·
Even though it was almost 2500 years ago, you can still see the way Alexander the Great's engineers permanently changed the coastline during the siege of Hakodate
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ぐり@関賢太郎 航空軍事記者
ぐり@関賢太郎 航空軍事記者@gripen_ng·
アメリカという国は不思議である。国民の3割もが地球平面説を正しいと信じている科学リテラシーの低い国なのに、月に人を送って無事に帰還させるチームが存在するのだから。
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@TomMoyerUT Ubiquitous reliable charging would increase the effective charge rate of existing infrastructure. It would allow people to drive deeper into battery state of charge knowing you could find a charger when you get to 10% charge. Charging works faster at low state of charge.
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Tom Moyer 🇺🇸
Tom Moyer 🇺🇸@TomMoyerUT·
Summary of my argument: Five-minute EV charging will be available to you. It will come at a cost. In the US, drivers will generally not choose to pay that cost. People will discover that that feature isn’t actually very important. Ubiquitous, reliable charging *is* important.
Tom Moyer 🇺🇸@TomMoyerUT

Unpopular opinion: This is a party trick and won’t be used much because the infrastructure to deliver 1.5 MW is expensive. Having ubiquitous, reliable charging is a lot more important than cutting the charge time from 15 minutes to 5 minutes.

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Reid Wiseman
Reid Wiseman@astro_reid·
@JaneidyEve @elonmusk I took that single photo with a wide angle 14-24mm lens….the moon was out window 3 and the earth was out window 4. I didn’t know it got downlinked! AMAZING!
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Reid Wiseman
Reid Wiseman@astro_reid·
On the helicopter leaving the ship right now. This planet is impossibly beautiful from every altitude I’ve seen it…surface to 250,000 miles
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Melanie D'Arrigo
Melanie D'Arrigo@DarrigoMelanie·
"The Iranians don’t seem to realize they have no cards..." They actually have a Strait.
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@avrilbradley23 This has been an issue in Amish country for decades. Some turn to small scale industry, others form new settlements in other states.
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Jerome Sneed Democrat
Jerome Sneed Democrat@avrilbradley23·
Given Amish dont use birth control it'd be "interesting" (in the Chinese sense) to see a Malthusian crisis in Amish country where population grows despite declining supply of land. Given modern food supplies they wouldn't starve ofc so curious how the Amish would respond.
Jerome Sneed Democrat@avrilbradley23

@akhivae Do Amish generally delay marriage til they have an independent homestead?

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Josh Hopkins
Josh Hopkins@SpaceJosh·
@ChrisExpTheNews Yeah, applying geometry to this is like using probability theory to bet against a guy who says he can guess which card you randomly pull out of a deck.
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@choffstein You should not take a deal like this with finite upside and infinite downside unless you have high confidence the counterparty wants you to succeed. If the envelope is moving, inaccessible, or hidden in a pile of a million other envelopes, you die.
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Corey Hoffstein 🏴‍☠️
Corey Hoffstein 🏴‍☠️@choffstein·
Week 1: Don't move. You are given distance D1. Week 2: Go 100 miles north. You are given a new distance, D3. Week 3: Go 100 miles east. You are given a new distance, D3. Draw three circles on your map based on your three starting points and their radiuses D1, D2, and D3. Where those three circles intersect is where the box is. You have 49 more weeks to hone in exactly. Good luck.
Hazel Appleyard@HazelAppleyard

Absolutely not????

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Josh Hopkins
Josh Hopkins@SpaceJosh·
@mcrs987 Very early on, Orion was intended to land in the continental United States. At one point there was a “thousand pound mammal requirement” in case it landed on a cow.
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TheSpaceEngineer
TheSpaceEngineer@mcrs987·
Had the most bizarre thought just now. Has anyone ever accounted for damage to a returning spacecraft if it hits a bird on the way down It's like statistically way way way down there but it's a funny thought
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Ed Lu
Ed Lu@astroEdLu·
The Shuttle simulator had no way to simulate the g forces, but the Russians had a simulator in a huge centrifuge. So if you screwed up and did a 9 g reentry, you actually had the pleasure of feeling that in the centrifuge. Good times!
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@MrLeadslinger @aF9q I’m an aerospace engineer who has worked on lunar missions. I’ve read, and in many cases reverse-engineered, many thousands of pages of Apollo documentation. Forget the film footage, I’m convinced it would’ve been easier to go to the Moon than coherently fake all that paperwork.
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𝙼𝚁. 𝙻𝙴𝙰𝙳𝚂𝙻𝙸𝙽𝙶𝙴𝚁
𝙼𝚁. 𝙻𝙴𝙰𝙳𝚂𝙻𝙸𝙽𝙶𝙴𝚁@MrLeadslinger·
I’ve never understood how some people don’t realize that the idea that the entire space program, mercury, Apollo, moon landings etc. was a tremendously expensive multi decade hoax that has never been fully revealed or confirmed, is actually a bigger stretch of the imagination than believing that they put tons of money into a program using the best minds and bravest men they could find and actually accomplished a tremendous feat.
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@AndySaunders_1 I’m curious about the mechanics of taking a ten second exposure in the case. Do you know how the camera is held stationary? Is it mounted to the spacecraft? Is anything special done to minimize spacecraft jitter?
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Andy Saunders - Apollo Remastered
Andy Saunders - Apollo Remastered@AndySaunders_1·
This was taken in the shadow of the Moon by the crew of Artemis II. The Sun's light was blocked, revealing a sky bursting with stars and our own Milky Way. A view of the universe rarely seen by human eyes. Nikon Z9, 35mm lens, 10sec exposure.
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Josh Hopkins
Josh Hopkins@SpaceJosh·
@BobMurphyEcon Any detailed discussion of that image should also explain that actually it is a photo mostly of the nearside and the limb, not the farside of the Moon. Only the leftmost slice is the farside.
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Robert P. Murphy
Robert P. Murphy@BobMurphyEcon·
It's like the video of the lady freaking out about how her mirror "knows what's behind the blanket." Most of the people mocking her, wouldn't have been able to actually explain it.
Robert P. Murphy tweet mediaRobert P. Murphy tweet media
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NASA Artemis
NASA Artemis@NASAArtemis·
Earthset. The Artemis II crew captured this view of an Earthset on April 6, 2026, as they flew around the Moon. The image is reminiscent of the iconic Earthrise image taken by astronaut Bill Anders 58 years earlier as the Apollo 8 crew flew around the Moon.
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Keşfet

@TomMoyerUT @JaneidyEve @elonmusk @avrilbradley23 @ChrisExpTheNews @choffstein @mcrs987 @MrLeadslinger