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The W - Current Events & Politics - NASA (Page 2)
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Zeruel
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Since: 2.1.02
From: The Silver Spring in the Land of Mary.

Since last post: 8 days
Last activity: 1 hour
#21 Posted on | Instant Rating: 4.05

    Originally posted by Scott Summets
      Originally posted by Grimis

        Originally posted by Scott Summets
        For more than 15 years we have known how to go 10% the speed of light, and up to even conciveably 33% the speed of light by utilizing Nuclear weapons explosions to power and speed our space craft. It's really complicated stuff, but I read a article by Carl Sagan on the topic, and he spoke about it in Cosmos, how its a shame we can't use Nukes in space, because it would benefit us so much.


      Now I've heard about using ion propulsion to get us close to the speed of light. But I don't buy using nukes to get us to 60,000 miles-per-second.



    I used to be really into this topic, but sadly all my books and tapes are at home, but from what I remeber from them, plus my college physics class last semester, space travel is basically attained by pushing anything out the back of the craft to shoot it forward. Simple, it follows Newton's Laws, every action has an equal and opposite reaction. Also, space has no gravity (sorry if this is simple, but it sets up how ion propulsion works), therefore its much easier to propel yourself, this is why a tiny rocket in space is much more effective than a huge booster rocket on the ground. With nothing stoping you, shooting tiny ions out the back will propel you and keep you moving. I don't know about speed of light, but I know NASA has made ion propulsion units that go several thousand miles of hour and keep going faster slowly. But what Sagan said is that with a big enough rocket on the back of a ship, a controlled nuclear explosion could not only power the ship, but if the excess force was shot out the back, send it off at an amazing rate of speed, which makes sense if you consider that a nuclear blast is so much stronger than a simple ion.

    After reading Pool Boy's post below, he makes a good point. But honestly, I have seen some INSANE plans for a spacecraft with a 100 mile sized reactor/engine that actually does use nuclear explosions. Sure, there is a .1 percent chance of that being made any time soon, but its good to dream, isn't it?

    (edited by Scott Summets on 4.2.03 1358)



also, it would make it easier if one was able to excape the suns "influence" (i forgot the techinal term for the area where it still attracts objects with it's gravity, where the voyager spacecrafts are heading towards and crossing right now)



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Since: 11.7.02
From: MD

Since last post: 1238 days
Last activity: 1035 days
#22 Posted on | Instant Rating: 7.29
    Originally posted by rikidozan
    also, it would make it easier if one was able to excape the suns "influence" (i forgot the techinal term for the area where it still attracts objects with it's gravity, where the voyager spacecrafts are heading towards and crossing right now)


I think what you're refering to is the heliopause, which is the point where the reach our Sun's solar winds stops.

(edited by Grimis on 4.2.03 1625)


Americans are a resolute people who have risen to every test of our time. Adversity has revealed the character of our country, to the world and to ourselves. America is a strong nation, and honorable in the use of our strength. We exercise power without conquest, and we sacrifice for the liberty of strangers. Americans are a free people, who know that freedom is the right of every person and the future of every nation. The liberty we prize is not America's gift to the world, it is God's gift to humanity.
- President George W. Bush, State of the Union Address, 1/28/2003
calvinh0560
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Since: 3.1.02
From: People's Republic of Massachusetts

Since last post: 529 days
Last activity: 9 hours
#23 Posted on | Instant Rating: 0.00
Everything in the universe has a gravitational pull on everything else its just really really weak. I even effect of orbit of the sun around the galaxy.
ION PROPULSION This is a short page about Deep Space One. It is a good read.


(edited by calvinh0560 on 4.2.03 1554)
Jackson
Sujuk








Since: 4.1.02

Since last post: 1958 days
Last activity: 1484 days
#24 Posted on | Instant Rating: 2.10
Who needs nuclear or Ion propulsion? Every taxpayer already knows that our shuttles can already go warp 18




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Since: 11.7.02
From: MD

Since last post: 1238 days
Last activity: 1035 days
#25 Posted on | Instant Rating: 7.29
CNN get the facts wrong? I am shocked, positively shocked at this development.

Of course, given the circumstances(I'm assuming this happened during the course of events on Saturday) I'll give them a pass...



Americans are a resolute people who have risen to every test of our time. Adversity has revealed the character of our country, to the world and to ourselves. America is a strong nation, and honorable in the use of our strength. We exercise power without conquest, and we sacrifice for the liberty of strangers. Americans are a free people, who know that freedom is the right of every person and the future of every nation. The liberty we prize is not America's gift to the world, it is God's gift to humanity.
- President George W. Bush, State of the Union Address, 1/28/2003
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From 1980 onwards we have moved to deregulate like hell. We essentially told these SOBs that since they handled lots of money they must be smart and crap gold. Responsibilty didn't matter, only showing that big juicy profit.
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