pocketstar

>none of that stuff will be in orbit in 60m years. where will it go? it wouldn't have the drag or the delta-v to reenter. i think the parent meant geostationary altitude, but "geostationary" orbits are "relatively" cyclically stable. most significant perturbations, you mentioned some, are all <100 year cycles. If there was another spacefaring civilization >60m years ago i think there would be evidence, in orbit.

The satellite was headed to geostationary orbit over africa, 4Deg west. Unless you live in northern africa the satellite would never be overhead.

Facebook didnt own the satellite, msm would lead you to believe they did. Facebook had just leased all the capacity of the satellite from Spacecom. Facebook lost nothing, there was no feaud.

a "radiator" is a heat exchanger and "radiator" is the industry standard term. these semantics are required for effective communication about technical topics.

"A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence." [0] Black bodies are theoretical, they do not exist. Apollo had radiators, they might have been black but they were not a black body. Vantablack comes close to a black body for the visible spectrum which is p cool tho.

[0]https://en.wikipedia.org/wiki/Black_body

A majority of the exterior surfaces on spacecraft are black, gold or OSR. The black or gold however is multi layer insulation. Where the outboard surface would get hot and the inboard surface would be cooler. Where the OSR surface is your radiator area. Regardless, all visible in IR.

those black body radiators(doesnt exist) will be visible in the IR...unless you can get them down to 3K to blend in with the background. Running a spacecraft that cold is pretty impractical because all the bus equipment uses power and any power=heat. Any power generation will be hot, rtg or solar.

Like the JWST?

a "matte black" spacecraft would get very very hot, too hot for most electronics and be detectable with an IR camera. ion thrusters use significant power and would require a large and visible solar array. misty would be technically possible but a motivated adversary would probably be able to find it. stealth spacecraft are difficult.

SpaceFlight.com can handle the launch. Why do you want a LEO orbit, there might be better orbits for your mission? You'll probably want a radhard processor instead of a Pi Zero. You will also need Batteries, Thermal, Attitude Determination and Control, RF and antennas...minimum budget is probably $1M including launch for a "server in space" mission. There is a lot that goes into making a spacecraft. A good book to pick up is SMAD[0]. Reach out to me if you have the resources, I'd be happy to help.

[0]https://www.amazon.com/Space-Mission-Engineering-Technology-...

inlk has the publications you listed(excluding Nautilus) and is only $15AU/month [~$11USD] its not the greatest but it is a decent service that I can use to support journalism.

Electromagnetic shielding with superconductors is probably better than a mass solution.

No spacecraft can hope match terrestiral latency, the speed of light is not your friend. There was an identical push for space ISPs in the 90's. Iridium was the only sucessful leo space "ISP". Elon has been sucessful with what he says he will do but all these space bases "ISPs" are vaporware until they deliver. Look at the joke of oneweb with their botched softbank merger with intelsat, consilidating billions of dollars of existing debt to fund another few billion to develop a new constillation does not bode well.

Echostar is doing a good job with their proven GEO ISP constillation. With several billion in the bank they are the most promising to be sucessful, keep an eye on their HTS development over the next couple years. The problem with GEO ISPs is they have 1-2s latency :(

Try Lyft Premier: https://blog.lyft.com/posts/introducing-lyft-premier

Or do you explicitly want a black car...?

There are breakthroughs in material science everyday. The biggest break through happened recently by henry bessemer in the 1800's, called the bessemer process.

Steel and concrete will not be replaced anytime soon, with steels infinite fatigue life combined with concrete creating a tensegrity structure. It is the perfect combination for large, cheap and long life structures. I don't see a need for new materials to build "cities of the future" I think glass, steel and concrete are sufficient.

Breakthrough with 10-1000x reduction in specific density I'd keep an eye out for in the next decade are metal-air batteries.

Pick up a book on material science, learn the laws of physics.

Do the Math. Build the robot. Save the world.

I've heard its C++ at spaceX, they had a company standard C++ interview test.

Notational Velocity. The project has been abandoned for years on github, because NV is perfect. Syncs with simplenote if you want. NV is just a simple, fast, notes app, full of useful hotkeys. I've used NV daily for the past 6 years with zero issues.

No mention of Ni-Fe batteries, they are significantly more robust than LA or Li and have 30+ year lives.

Asteroid mining & Spacestations/microgravity habitation.

4-day smartphone* battery, I can remember when I only charged my mobile telephone once a week.

Uh, welcome to the internet? Outside the internet you can vote with your money, on the internet you must vote with your time(youtube's product). Stop selling your time to youtube.

Pentel EnerGel Liquid Gel Ink 0.5(Made in Japan) is the best left friendly pen I have used to date, ink dries instantly so no lefty smudge. The sharpie pen is a close second.

This article fails to mention the aging Cactus Dome containing gratuitous amounts of radioactive soil that will breach containment soon and cause fukushimachernobyl9/11*1000 radioactive damage

SpaceX's reusabulity efforts are just another incremental improvement to existing rocket technology. Reusable launch vehicles are nothing new. If they can get launch costs down to $60m with their reusable technology that would be great! However, they still can't launch anything >5000kg so it's a pretty mixed bag and a lot of good marketing.

Pick one: https://en.m.wikipedia.org/wiki/List_of_private_spaceflight_...

Correlation != causation. Only recently has mass media decided to push tech billionaire's pet projects as "space news", that's is all this shows. There are dozens of other arguably more significant space projects flying under the mass media's radar.

Before medication try Cognitive Behavioral Therapy, Read: Feeling Good: The New Mood Therapy by David B. Burns

Every aluminum macbook(pro/air) that I have used gets hot from basic use. The computer will feel hot to the touch because aluminum is such a good thermal conductor(170W/mK). smcfancontrol can be your friend if you have legitimate heat issues.

Define overheat...the MBP just gets hot "overheat" or greyscreen of death "overheat"?