Japanese Startup Wants To Rain Down Man-Made Meteor For Tokyo Olympics (sciencealert.com)

A startup called Star-ALE wants to create a man-made meteor shower over the city of Tokyo for the 2020 Olympics opening ceremonies. The pyrotechnics show, Star-ALE says, will be visible from an area 200km across Japan, and the pyrotechnics will actually shower from space. Starting next year, Star-ALE will begin sending a fleet of microsatellites carrying 500 to 1000 specially-developed pellets that ignite and intensely glow as they re-enter the earth's atmosphere. ScienceAlert reports: But wonderment comes at a cost, and in this case, that cost isn't cheap. Each combustible pellet comes in at about $8,100 to produce, and that's not including the costs involved in actually launching the Sky Canvas satellite. The company has tested its source particles in the lab, using a vacuum chamber and hot gases to simulate the conditions the pellets would encounter upon re-entering Earth's atmosphere. In its testing, the particles burn with an apparent magnitude of -1, which should ensure they're clearly visible in the night sky, even in the polluted skyline of a metropolis like Tokyo.

Comments

How sad

[Anonymous Coward]

It saddens my heart to see the billions spent on these sporting events that today have nothing to do with the spirit of the events but everything to do with bolstering ego's of politicians and piss away money. Imagine if this kind of money was used to build infrastructure, provide solutions for clean water and food where needed, I imagine that would be a world less stricken by suffering, poverty and war. It would be a world with fewer refugee crisis as people generally like to live where thwy were born, and if the resources for a decent life existed migration would be for the few adventurous souls rather than for the suffering masses... wake up!!!

Re:How sad

[eyenot]

If you think money solves the world's worst problems, you've lived with a lack of one of two things:

* that kind of money

* any understanding of what's actually causing those kinds of problems

You can't just throw "money" at drugs, poverty, disease, hunger, and despair, and expect them to go away.

In most cases, the money you're throwing goes directly into the hands of people who do the most harm with the most money.

Re:How sad

[Anonymous Coward]

You can't just throw "money" at drugs, poverty, disease, hunger, and despair, and expect them to go away.

Sure you can! Money directly fixes poverty, money buys food and medicine and high quality drugs, and with all those problems solved then despair suddenly vanishes. See your trouble is you just haven't tried the really high quality drugs yet.

Re: How sad

[Anonymous Coward]

I really enjoy the sports at the Olympics, but I don't care for the excess. A big part of Greece's financial issues go back to the tremendous amount of public debt from hosting the Olympics in 2004. Priority should be given to cities that already have much of the required infrastructure instead of building it. There also needs to be a plan for how any new venues will be used in the future. In addition to being more financially responsible, it would be more environmentally friendly and produce less waste.

Re: How sad

[Anonymous Coward]

Greece would be in a better position to handle the influx of refugees if they weren't in a ridiculous amount of debt. Life in Greece would be much better off in general without the debt. A lot of that debt came from hosting the 2004 Olympics. In this case, Greece funded the Olympics with money they didn't have and might well not have otherwise been spent.

Re:How sad

[drinkypoo]

You can't just throw "money" at drugs, poverty, disease, hunger, and despair, and expect them to go away.

You can just throw money at poverty and at least thereby improve the people's lot. It's a better stimulus plan than virtually anything else, because if you give the money directly to people they will usually spend at least a portion of it locally and that also stimulates the economy.

Re:How sad

[ljw1004]

You can't just throw "money" at drugs, poverty, disease, hunger, and despair, and expect them to go away. In most cases, the money you're throwing goes directly into the hands of people who do the most harm with the most money.

Strangely enough, you can just throw money directly into the hands of the people who suffer poverty and hunger (rather than the middle-men) and it does actually seem to work. Here's an example from The Economist:

http://www.economist.com/news/...

"Now enough of these programmes are up and running to make a first assessment. Early results are encouraging: giving money away pulls people out of poverty, with or without conditions. Recipients of unconditional cash do not blow it on booze and brothels, as some feared. Households can absorb a surprising amount of cash and put it to good use. But conditional cash transfers still seem to work better when the poor face an array of problems beyond just a shortage of capital."

(I remember another funny quote from someone but can't find it just now, along the lines "The common characteristic of the poor is they don't have money, and it turns out that by giving them money we can change that.")

Bad Moderation

[Anonymous Coward]

I made the above comment in good faith, as I did with a similar comment elsewhere in this thread. Both are at -1.

The effect of hosting the Olympics on Greek debt has been widely reported.
http://www.bloomberg.com/news/articles/2012-08-02/how-the-2004-olympics-triggered-greeces-decline
http://www.news.com.au/sport/sports-life/a-dark-olympic-legacy-for-greece/news-story/8dcf6d1e8df9fe2e0f93ff12e74b1b72

Furthermore, there are economic studies in the US that show that public subsidies for sports venues aren't worth it.
http://www.wsj.com/articles/use-of-taxpayer-money-for-pro-sports-arenas-draws-fresh-scrutiny-1425856677

My comments are supported by plenty of research on these topics. There's no good reason why my posts were modded down. I'm not sure why I bother trying to make good posts if moderators are going to downmod them to -1 where most people won't see them. I can only assume I was modded down because someone disagreed with my posts, which is a blatant abuse of moderation.

Re:Bad Moderation

[l0n3s0m3phr34k]

Stop posting as an AC, that would help tremendously.

Bad Moderatiom

[Anonymous Coward]

Why is this post at -1? These are legitimate issues that have been raised by many people.

I'll again cite this article: http://www.news.com.au/sport/sports-life/a-dark-olympic-legacy-for-greece/news-story/8dcf6d1e8df9fe2e0f93ff12e74b1b72.

The article notes that Sydney fared much better with the costs of hosting the Summer Olympics because they had plans to continue using the venues they built, even after the Olympics were over. They brought in additional revenue which helped to offset the costs. The Olympic Stadium in 1996 was Turner Field in Atlanta. That stadium is now being replaced, but the Braves have played there for 20 years. That hasn't happened in Athens, where those venues were built at a similarly large price tag but have subsequently sat vacant.

In the case of the World Cup, Qatar is using migrant workers, who have awful working conditions, to build numerous stadiums in the desert for the 2022 World Cup. Many of these stadiums won't long term uses. It would have been far better to choose the primary competing bid from the United States, which has more than enough stadiums to host the World Cup. No additional venues would be built to host the World Cup in the US; we would use what we already have. It's a far less costly solution and one that produces far less waste and has much less environmental impact.

There's no good reason for the above post to be at -1. I can only assume it was modded down because someone disagreed. That's an abuse of moderation. Too often, posts that get modded down incorrectly don't get modded back up and people don't see them. Why bother making good comments when abusive moderators are going to mod them down?

A fly in the ointment?

[petes_PoV]

should ensure they're clearly visible in the night sky, even in the polluted skyline of a metropolis like Tokyo.

Unless it's cloudy.

Re:This is why the Olympics suck

[Rei]

One thing that bugs me about this summary:

At orbital velocity (LEO) an object has a potential energy of around 30MJ per kilogram, an energy density higher than ethanol. Black powder, by contrast (common in fireworks) has 1/10th that energy density. The various colours, with the exception of white, are generally from rather weakly combusting compounds. There's a lot more energy to be had for producing "glow" from the orbital energy rather than whatever they want to burn to produce a coloured glow. And the colour of the thermal radiation from reentry will depend on the surface temperature, and that's customizeable for red, orange, yellow, and white (no green, blue or purple, though) just through simple blackbody emission, customizeable if specific ions are being ablated that tend to radiate in certain bands. The blackbody colour can be varied over the course of reentry by changing the drag coefficient as the surface ablates.

Perhaps "combustion" is the wrong term, perhaps they're just talking about ablation?

Honestly, you don't need special pellets to make a neat fireworks display, rockets can do that themselves ;) In fact... hmm... now that I think about it, the most cost-efficient way to get strange atmospheric effects might be barium clouds. They only require sounding rockets, the glow comes from the below-horizon sun itself, they show effects of the solar wind on the atmosphere (sort of like artificial auroras), and are often mistaken for UFOs and can look like slow fireworks when they expand.