EPTNASA and the Private Sector - Page 76
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Keep debates civil. | ||
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lastprobeALIVE
United States974 Posts
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Yurie
12082 Posts
On January 19 2016 05:08 lastprobeALIVE wrote: What about going to Mars with possibility of mining gold or some other resource Mars is a very strange pick to mine it from. It has a decent gravity well. An Asteroid doesn't. | ||
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Belisarius
Australia6233 Posts
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Simberto
Germany11803 Posts
On January 19 2016 05:08 lastprobeALIVE wrote: What about going to Mars with possibility of mining gold or some other resource Gold is completely overrated as a ressource. We have far more gold than we need for anything useful. The only reason gold is valued is because people believe that in the future, someone else will take that gold off of them for something else they actually want. Or you gift gold to someone else to show them that you like them because gold is very expensive because people buy gold to gift to other people to show them that they like them because gold is very expensive etc... I'd hope that once people start mining stuff in space, it is for things that are actually useful, not gold. | ||
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nikj
Canada669 Posts
On January 19 2016 07:54 Belisarius wrote: This thread would be a lot more interesting if everyone just filtered out JJR's posts. Can we petition to ban him from this thread like he is in the Hockey Threads? | ||
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DaCruise
Denmark2457 Posts
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JimmyJRaynor
Canada17464 Posts
On January 19 2016 08:13 nikj wrote: Can we petition to ban him from this thread like he is in the Hockey Threads? lol no way to dispute the content of my posts... so you try this. if u actually read my posts you'd be able to tell i don't like the NHL because there is not enough scoring. http://www.teamliquid.net/forum/sports/474167-junior-hockey-championships-2015 http://www.teamliquid.net/forum/sports/485296-iihf-world-championship-2015 back to something interesting. i wonder how the circulatory systems of advanced mammals will withstand long periods of time near a lagrange point. and i wonder about inner ear issues in general. http://www.sciencealert.com/nasa-upping-the-competition-on-spacex the gravity of the ISS is about 90% of earth gravity so its not really an adequate test. With the DreamChaser's 210 day space faring capability it'll be interesting to see how far they send it. and more about the DreamChaser here http://www.americaspace.com/?p=90700 | ||
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Yurie
12082 Posts
On January 21 2016 09:31 JimmyJRaynor wrote: the gravity of the ISS is about 90% of earth gravity so its not really an adequate test You can get weightlessness on an air plane. It is even easier for a satellite such as ISS. It isn't perfect but it as close as we can get without moving it further out. The Earth's gravity is only slightly weaker at the altitude of the ISS than at the surface, but objects in orbit are in a continuous state of freefall, resulting in an apparent state of weightlessness. https://en.wikipedia.org/wiki/International_Space_Station | ||
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Evotroid
Hungary176 Posts
On January 21 2016 09:31 JimmyJRaynor wrote: lol no way to dispute the content of my posts... so you try this. if u actually read my posts you'd be able to tell i don't like the NHL because there is not enough scoring. the gravity of the ISS is about 90% of earth gravity so its not really an adequate test What? the gravity at the altitude of the ISS is about 90% of earths, but because the ISS orbits the earth at high speed, it cancels out with the outward acceleration, and the astronauts do experience proper micro-gravity (also, lol, did you never even see one video of life on ISS and thought that, that can't be just 10 percent less gravity?) See, it is that easy disputing the content of your posts, I only turned off my script because my inner drama queen wanted to see how you answer to the call-to-ban (I am ashamed but whatever.). Not surprisingly with some misinformation. But good on SNC for the mini shuttle, I can't wait to even more competition! | ||
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oBlade
United States6055 Posts
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JimmyJRaynor
Canada17464 Posts
On January 21 2016 09:59 Evotroid wrote: What? the gravity at the altitude of the ISS is about 90% of earths, but because the ISS orbits the earth at high speed, it cancels out with the outward acceleration, and the astronauts do experience proper micro-gravity (also, lol, did you never even see one video of life on ISS and thought that, that can't be just 10 percent less gravity?) Force and Acceleration are 2 different things. Acceleration in metres per seconds squared can not "cancel out" a Force in Newtons. Also there is no "outward acceleration". The ISS is being pulled towards earth via a force F in newtons. F = (G*m1*m2)/(d^2) where m1 = Mass of Earth m2 = Mass of the ISS d = distance between the centre of gravity of earth and centre of gravity of the ISS. d is slightly larger than when in orbit versus onearth accounting for the slightly lower FORCE of gravity on the ISS. if you plug in the #s yourself you'll see the result. its also all over the NASA site. i'm too lazy to find and link it. the astronauts "appear to float" due to a VELOCITY perpendicular TO the constant acceleration due to the force of gravity. the actual force of gravity is about 90% of the force we experience on earth. as noted by Yuri's links and post. this velocity in metres per second does not "cancel out" any FORCE in Newtons. the astronauts experience this force in newtons in accordance with the equation in my post. m2 would be the mass of the astronaut. and, also, none of this provides any information about the impact on the inner ear at a lagrange point which is what i mentioned in my post. | ||
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cLutZ
United States19574 Posts
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micronesia
United States24768 Posts
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JimmyJRaynor
Canada17464 Posts
"those are going to change so rapidly on return that we need to have the animals back right away" is their quote. as an aside what i'm hoping for is this: the DreamChaser can go into space for 210 days and hopefully can enter the lagrange point between the earth and moon and provide some good tests that can't be accomplished on the ISS. this can provide insights on how to deal with circulatory and balance issues for manned missions that travel far away (100,000+ km) from earth. on the ISS there is effectively only 1 force acting upon the astronauts. the force of gravity of the earth. | ||
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micronesia
United States24768 Posts
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misirlou
Portugal3292 Posts
First of all, they also "upped the competition" on OrbitalATK, since they are on CRS-1 together with SpaceX. Second, this is a reasonable move from NASA and aligns with their goal of CRS-1. They want more than one launcher so they don't loose capability and 2 proved to be insufficient when both Orbital and SpaceX were grounded after both failed. So they are going with 3 this time. I am very happy with those news, DC seems like a very good idea and I was very disappointed SNC didn't get the commercial crew contract, after supposedly being selected and swapped last second for Boeing. As for the gravity part, I'm not gonna waste my time, plenty of other people already did. You bring your fancy math and you throw all three newtons laws out of the window in a single post. e: the new planet theory sounds pretty cool, not sure if the researchers got really lucky to find the orbital anomaly on those smaller bodies or if it exists in several other bodies that weren't noticed/found. Hope they can find the planet to prove it, now that we have an idea of it's orbit it shouldn't take very long | ||
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JimmyJRaynor
Canada17464 Posts
On January 21 2016 12:22 misirlou wrote: "NASA ups the competition on SpaceX by partnering with new 'Dream Chaser' spacecraft" Man you couldn't find a more flame bait title for the thread could you? First of all, they also "upped the competition" on OrbitalATK, since they are on CRS-1 together with SpaceX. Second, this is a reasonable move from NASA and aligns with their goal of CRS-1. this is the opening line of the article i posted.,, "NASA added a new member to its International Space Station (ISS) supply team that just dialed up the pressure on pre-existing members SpaceX and Orbital ATK" it says what you just said in the opening line of the article. this thread is called NASA and the private sector. There is competition in the private sector. NASA added Sierra Nevada Corporation (SNC) Space Systems to the team. no clue how any of this is flame bait. its a link to a news post. your attack of my posting a basic news item that is the core of this thread's purpose is ridiculous. no one else posted anything about Sierra Nevada Corporation (SNC) Space Systems. so i did. On January 21 2016 12:02 micronesia wrote: If the force of gravity is acting on an animal while it is on the ISS, that force is causing the animal to accelerate towards the Earth. Therefore, the animal's body does not really feel or get affected by the force internally. The experience is the same as floating in deep space. I don't see how the difference in force of gravity between the Earth's surface and the ISS will affect the health of the animal unless you are studying the effects of 0g on animals, which is nothing new. the claim of SNC is that they can bring the animals back to earth more quickly and this allows for better testing. the exact quote in the article is "those are going to change so rapidly on return that we need to have the animals back right away," | ||
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misirlou
Portugal3292 Posts
If you want to argue that you're posting it to let everyone else know instead of baiting, well, it's a week old news. | ||
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JimmyJRaynor
Canada17464 Posts
here is the title of the other news item. "Dream Chaser's First Launch Will Fly to ISS, SNC Outlines Testing and Development Plans Ahead" wow... amazing flame bait. you are pulling 1 link out of a huge post so far out of context its hilarious. the link i posted was introduced by me talking about biological research and space travel. and the news item discusses that very issue...and the opening line in the article explains how they compete with 2 different companies. | ||
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Soap
Brazil1546 Posts
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