@nyrath@spacey.space
@nyrath@spacey.space avatar

nyrath

@nyrath@spacey.space

Star map and Atomic Rocket geek. The hard-science SF writer's tech support. The website is at
http://www.projectrho.com/public_html/rocket/

Refugee from the decline and fall of Google Plus.

In my long and misspent youth I did the artwork for various TTWG such as Ogre, WarpWar, GEV and such.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

nyrath, to random
@nyrath@spacey.space avatar

Boeing Says Leak on Its Spacecraft Is Totally Fine, Will Launch Astronauts Without Fixing It

Okay then.

https://futurism.com/the-byte/boeing-will-launch-spacraft-with-leak

cstross, (edited ) to random
@cstross@wandering.shop avatar

Random musing:

What is the werewolf gut microbiome like? And what happens to it when a were shifts form? (Do humans get copious diarrhoea/purge themselves right after shifting? And what happens to the gut contents if a werewolf gorges on meat right before shifting back to human?) What about parasites in raw meat, eg. trichinosis?

And are xanthine alkaloids (like theobromine, found in chocolate) as toxic to werewolves as they are to canids?

nyrath,
@nyrath@spacey.space avatar

@cstross @serendipityjones

What about a tranquilizer gun, firing hypdermic darts full of chocolate milk or something?

nyrath,
@nyrath@spacey.space avatar

@isaackuo @cstross @serendipityjones

Sorry. Went sailing over my head like a cirrus cloud

nyrath,
@nyrath@spacey.space avatar

@isaackuo

Apparently from a movie called "Top Secret", which I've never seen.

nyrath,
@nyrath@spacey.space avatar

@DenOfEarth

https://www.imfdb.org/wiki/Top_Secret!#M1928_Thompson

klausman, to SF
@klausman@mas.to avatar

@nyrath I had a random thought today: HS: Shipbreaker is kinda the opposite of Kerbal, and yet, both contain plenty of unintentionally exploded ships.

nyrath,
@nyrath@spacey.space avatar

@klausman

Good point.

Ship builder opposite of ship un-builder.
But why so many wrecked ships that look like exploded metal lilly flowers.

nyrath, to random
@nyrath@spacey.space avatar

Inside a vintage aerospace navigation computer of uncertain purpose

(If nothing else, a nifty artist reference for obsolete analog circuit boards.)

http://www.righto.com/2024/05/blog-post.html?m=1

isaackuo, to space
@isaackuo@spacey.space avatar

How to launch from Titan with 3.9km/s TSTO:

(Geoffrey Landis and others)

https://ntrs.nasa.gov/api/citations/20210025383/downloads/Titan%20Sample%20Return_AIAA-SciTech_Finals%20(002).pdf

You first go slow - less than 100m/s (360kph, or 220mph) for the first stage, up to around 30-40km. This gets you above the thickest atmosphere. Then the second stage can take over with an engine more optimized for vacuum.

more commentary here: https://diaspora.glasswings.com/posts/a93f4630ffec013c9573448a5b29e257

#SpaceTechnology #SpaceExploration #Space #Titan #PostcardsFromCutty

nyrath,
@nyrath@spacey.space avatar

@isaackuo

Another example of LEO being "halfway to anywhere"

nyrath,
@nyrath@spacey.space avatar

@isaackuo

You said "Overall delta-v to Titan orbit is only 3.9km/s to orbit (which is much less than the ~10km/s required to launch from Earth to Earth orbit)"

"Halfway to Anywhere" is a Heinlein joke, meaning the delta-v from Earth's surface to LEO is about equal to delta-v from LEO to other planets in the solar system.

nyrath,
@nyrath@spacey.space avatar

@isaackuo

Indeed. Gravity tax and all that.

nyrath, to random
@nyrath@spacey.space avatar

US Army Airland Battle 2000 (1982 Version with Functional Areas) pdf file

https://apps.dtic.mil/sti/citations/ADA127471

image/jpeg
image/jpeg
image/jpeg

nyrath,
@nyrath@spacey.space avatar

@tkinias

I haven't read the paper yet. But I agree that is weird terminology

nyrath,
@nyrath@spacey.space avatar

@eldadoinquieto

Indeed so!

Not to mention The Morrow Project.

razumasu, to scifi
@razumasu@me.dm avatar

What’s your favorite book that features time travel? Let’s talk about bending time in literature!

nyrath,
@nyrath@spacey.space avatar

@razumasu

All of an Instant by Richard Garfinkle.

It takes place in the Block Universe model of time, eternalism version.

https://www.sfsite.com/10b/all67.htm

https://www.kirkusreviews.com/book-reviews/richard-garfinkle/all-of-an-instant/

cstross, to random
@cstross@wandering.shop avatar

I wonder what Dilbert Stark will make of this.

(Is it really wise of Trump to openly declare war on the owner of Twitter at this point?)
https://mstdn.social/@hkrn/112519375589535987

nyrath,
@nyrath@spacey.space avatar

@cstross

Maybe it is just me, but I have noticed what seems to be a tendency for people of that political persuasion to totally focus on short-term gain or satisfaction, and totally ignore any and all long-term consequences.

nyrath, to random
@nyrath@spacey.space avatar

Perhaps Space Mastodon can help me.

The image below is from Artificial Satellites of the Earth (1958)

I have a memory of seeing that image back in the 1960s, but I'm pretty sure I saw it in color. But the various image search engines are coming up empty.

Does any one else know where I can find the color version?

https://dreamsofspace.blogspot.com/2018/11/artificial-satellites-1958.html

nyrath,
@nyrath@spacey.space avatar

@60sRefugee

Thanks, but that is a group page that includes the exact same link from my question post.

Thanks anyway.

nyrath, to random
@nyrath@spacey.space avatar

https://youtu.be/5xG09d3WcGo?si=Kuzvsxx8z28UJGZc

johncarlosbaez, (edited ) to random
@johncarlosbaez@mathstodon.xyz avatar

Using his periodic table, Mendeleev predicted the properties of many elements that hadn't been discovered yet. But he missed others - and more than half of his predicted elements were never found!

Two of the most interesting are coronium and newtonium. He predicted both to have atomic masses lighter than hydrogen!

Mysterious green spectal lines had been seen in the Sun's corona in 1869. Mendeleev was not the only one who thought it was a new element: coronium. He estimated its atomic mass as 0.4. It later turned out to be a highly ionized form of iron, Fe¹³⁺, meaning that 13 electrons get knocked off by the extremely high temperatures.

Even more interesting is newtonium. Back then, a lot of people thought light consisted of vibrations in a mysterious substance called the aether. In 1904, in a 50-page paper called “An attempt towards the chemical conception of the aether”, Mendeleev hypothesized that the aether was a noble gas! A bunch of new noble gases had just been discovered, forcing a new column in his table. He dubbed this one newtonium, and he estimated its atomic mass as 0.17.

For Mendeleev's other never-found elements, and how he estimated the masses of coronium and newtonium, read this:

• Gábor Lente, Where Mendeleev was wrong: predicted elements that have never been found, https://link.springer.com/article/10.1007/s40828-019-0092-5

Moral: you don't have to be right all the time.

nyrath,
@nyrath@spacey.space avatar

@johncarlosbaez

I use Mendeleev's periodic table as a paradigm for science fiction authors brainstorming their scifi rubber-science. I call it the "interesting holes" technique.

https://www.projectrho.com/public_html/rocket/prelimnotes.php#interestingholes

nyrath,
@nyrath@spacey.space avatar

@johncarlosbaez

I noticed a reference to "coronium" in Fletcher Pratt's scifi novel Alien Planet (1960).
The alien ship uses it as rocket fuel. It has to travel to Mercury in order to harvest chromium from the solar photosphere.

nyrath, to random
@nyrath@spacey.space avatar

Project Hephaistos – II
Dyson sphere candidates from Gaia DR3, 2MASS, and WISE

https://academic.oup.com/mnras/article/531/1/695/7665761?login=false

nyrath, to random
@nyrath@spacey.space avatar

I must have weird taste in scifi movies.
I just watched Atlas and thought it was pretty good.

But I thought Rebel Moon stank on ice.

Go figure.

nyrath,
@nyrath@spacey.space avatar

@mds2

The danger of an artificial intelligence going all SkyNet on the human race.

nyrath,
@nyrath@spacey.space avatar

@tkinias

Titan has apparently gotten very bad reviews. I did read a couple of reviews singing the praises of Rebel Moon.

nyrath, to random
@nyrath@spacey.space avatar

Russian research on space nukes and alternative counterspace weapons (part 2)

https://www.thespacereview.com/article/4797/1

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • JUstTest
  • rosin
  • mdbf
  • tacticalgear
  • osvaldo12
  • InstantRegret
  • DreamBathrooms
  • cubers
  • magazineikmin
  • thenastyranch
  • khanakhh
  • Youngstown
  • slotface
  • kavyap
  • megavids
  • ethstaker
  • tester
  • GTA5RPClips
  • Durango
  • modclub
  • Leos
  • ngwrru68w68
  • everett
  • anitta
  • cisconetworking
  • provamag3
  • normalnudes
  • lostlight
  • All magazines
    •