Wednesday, September 2, 2009

A One-Way Ticket to Mars


A One-Way Ticket to Mars - NYTimes.com: "The most challenging impediment to human travel to Mars does not seem to involve the complicated launching, propulsion, guidance or landing technologies but something far more mundane: the radiation emanating from the Sun%u2019s cosmic rays. The shielding necessary to ensure the astronauts do not get a lethal dose of solar radiation on a round trip to Mars may very well make the spacecraft so heavy that the amount of fuel needed becomes prohibitive.

There is, however, a way to surmount this problem while reducing the cost and technical requirements, but it demands that we ask this vexing question: Why are we so interested in bringing the Mars astronauts home again?"

1 comments:

uriquaierardi said...

You don't need special glasses to play these video games, but the impact is much like watching a 3D movie. These types of free slots are good for Funsters who actually want to sit back and benefit from the full casino sensation. To get going, all {you have to|you need to|you must} do is choose which fun slot machine you need begin out|to https://thekingofdealer.com/jumbo-casino/ begin} with and easily click on to start out|to begin} enjoying in} for free! You can choose from Vegas slots, traditional slots tons of|and lots of} extra, if you play House of Fun casino slot machine video games. There are tons of of titles from which determine on}, including 3D video games, video slots, and progressive jackpots. Wild Casino has top-of-the-line slot sport welcome bonuses around.