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NASA Targets Venus, Asteroids With Potential Missions 47

coondoggie writes: NASA this week picked five possible contenders for a relatively low-cost robotic mission to space. The five candidates from a batch of 27 –include Venus, near-Earth object and asteroid operations – will ultimately be whittled down to one or two that will cost approximately $500 million, not including launch vehicle or post-launch operations, NASA stated. The DAVINCI probe would "study the chemical composition of Venus' atmosphere during a 63-minute descent. It would answer scientific questions that have been considered high priorities for many years, such as whether there are volcanoes active today on the surface of Venus and how the surface interacts with the atmosphere of the planet." A longer-range spacecraft called Lucy would "perform the first reconnaissance of the Jupiter Trojan asteroids, objects thought to hold vital clues to deciphering the history of the solar system."

Comment Bitcoin is experimental remember (Score 1) 93

Ok I'm a bitcoin fan-boy, I will say that bitcoin is an experimental currency. All other have infinite supply, and this one doesn't. Let the game play and see the result in the long terme. By the way this is many clone of Bitcoin including some without any limit.

Comment Re:Also Censorship Proof? (Score 1) 93

You can do it but that would cost you a lot of money as the amount of data stored is limited to 80 bytes per transaction and the transaction fee is proportially of the size of the transaction.
1 gig of data would be 12.5 millions transactions.
If you spend 0.00001 BTC in fee per transaction that would cost you 125 BTC or 28 426$ :)

Comment Re:mining (Score 1) 93

The concept of mining was to bootstrap the currency. How do you start it? who have how many? The big bank all start with 1 billion? They transfert a real billion to who to get the virtual currency? If they transfer the real money in a "pot", that would be a system the ACH in USA. Someone do control the pot. This has nothing to do with a decentralised blockchain.

The concept of mining CANNOT be removed that easy.

Comment Open or Close Blockchain (Score 4, Insightful) 93

Let me guess: they want to copy Bitcoin but not everyone can participate (only approved banks). They want to copy bitcoin but not everyone can mine (only major banks). They want to copy bitcoin but not everyone can see all transactions (filter to your own transactions only?). Yeap, it will end up with a close system in a centralized database just like they have right now.

Bitcoin is about losing control to anyone and open access.
  • - If not everyone can participate they will remove the consensus code and add some sort of centralized authentication.
  • - If not everyone can mine it they will again have some sort of centralized authentication.
  • - If they remove the mining entirely, the currency creation will be either pre-mined with some banks at start or distributed based on a some specific rule that will favor the big starting banks. Having no mining will also remove all incentive to validate the transaction, make the whole thing weak and prone to double spend attack.
  • - If they don't want everyone to see all the transactions, it will be close network with restricted access. A single bank could leaked out the entire blockchain, I'm not sure they really want to go in that direction!

Facebook Finally Ends XMPP Support For 3rd Party Chat 63

New submitter AcquaCow writes: Facebook has been pushing their Messenger app to all devices, requiring it for chatting with friends and family. It was announced last year that they would be ending their chat API and that the service would end on April 30, 2015. April passed, so did May, but the service remained functional. Finally, as of July 7th, 2015 it has not been possible to connect to This doesn't seem to be an outage at this point. Looks like we have to wait for 3rd party messenger apps to adopt support for Facebook's Platform API v2 to allow new connectivity.

Can anything be sadder than work left unfinished? Yes, work never begun.