Wed Oct 29, 2014, 05:25 PM
True Blue Door (2,969 posts)
China's Chang'e 5 lunar test vehicle captures amazing Earth + Moon image.
[img]
![]() http://www.planetary.org/multimedia/space-images/earth/earth-and-the-moon-from-change5t1.html The little-seen Far Side of the Moon is visible. The image on the site can be expanded to see details. Chang'e 5 is an unmanned vehicle on a circumlunar flight to demonstrate technologies for an eventual lunar sample return mission.
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18 replies, 1762 views
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Author | Time | Post |
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True Blue Door | Oct 2014 | OP |
Fred Sanders | Oct 2014 | #1 | |
True Blue Door | Oct 2014 | #3 | |
Fred Sanders | Oct 2014 | #4 | |
True Blue Door | Oct 2014 | #5 | |
Fred Sanders | Oct 2014 | #6 | |
True Blue Door | Oct 2014 | #10 | |
BlueJazz | Oct 2014 | #2 | |
Judi Lynn | Oct 2014 | #7 | |
lastlib | Oct 2014 | #8 | |
True Blue Door | Oct 2014 | #12 | |
ProdigalJunkMail | Oct 2014 | #9 | |
True Blue Door | Oct 2014 | #11 | |
ProdigalJunkMail | Oct 2014 | #13 | |
True Blue Door | Oct 2014 | #14 | |
lastlib | Oct 2014 | #15 | |
True Blue Door | Nov 2014 | #17 | |
Warren DeMontague | Nov 2014 | #16 | |
Odin2005 | Nov 2014 | #18 |
Response to True Blue Door (Original post)
Wed Oct 29, 2014, 09:51 PM
Fred Sanders (23,946 posts)
1. Third rock from the sun, the only rock we will ever have. Thank you and to China.
India has a Mars orbiter. Since America blew all its resources on wars, other nations will have to pick up the slack.
http://t.space.com/all/23203-india-mars-orbiter-mission-photos#1 |
Response to Fred Sanders (Reply #1)
Thu Oct 30, 2014, 09:09 AM
True Blue Door (2,969 posts)
3. I disagree that it's the only we will ever have.
That would be like saying the tide pool on which we first crawled on to land is the only one we would ever know.
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Response to True Blue Door (Reply #3)
Thu Oct 30, 2014, 09:45 AM
Fred Sanders (23,946 posts)
4. The tidal pool was on the planet, what OTHER planet could we possibly get to and live on? Mars?
Maybe, but America can not even launch a garbage pickup and food delivery rocket these days.
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Response to Fred Sanders (Reply #4)
Thu Oct 30, 2014, 11:16 AM
True Blue Door (2,969 posts)
5. Mars, absolutely - and within our lifetimes.
And you're over-generalizing a rocket failure that happened with one contractor because of a 40-year-old Russian rocket engine.
SpaceX (not Orbital Sciences, the one whose rocket failed) is steadily advancing the technology and reducing the cost of spaceflight. They have about a dozen flights scheduled over the next year, and most of them will provide opportunities to land a first stage for reuse. If they succeed, which they likely will on at least one of those flights, they will be able to gradually reduce the cost down to a tenth of what it is right now over two or three years. Mars is more or less inevitable. Longer term, there's no fundamental barrier to filling the solar system with humanity. Even floating cities in gas giant atmospheres are technologically possible, although that's centuries away. There was a lot of irrational enthusiasm during Apollo that thought everything would just automatically leapfrog to new heights beyond the Moon, but now there's irrational pessimism because of the "hangover" decades after the end of Apollo. Also, people don't pay attention to developments in this area, but I do, so trust me - you'll be seeing humans going places over the next decade. |
Response to True Blue Door (Reply #5)
Thu Oct 30, 2014, 01:38 PM
Fred Sanders (23,946 posts)
6. It is the unimaginable distances that overwhelm the technology...the fastest manmade object to
date has gone to 10 miles a second....a fraction of the speed required to ever even think about colonizing Mars, and living in a tent outside of which you instantly die is not colonization.
Time and distance, it will take a theoretical revolution in travel to make it happen....not in our lifetime. I appreciate the enthusiasm, but....... |
Response to Fred Sanders (Reply #6)
Fri Oct 31, 2014, 10:37 AM
True Blue Door (2,969 posts)
10. It will not take any theoretical revolution.
Current technology allows roughly 9-month transits every 2 years or so when orbits align. You need heavy shielding when you leave the Earth's magnetosphere, but that's not a problem if you radically reduce the cost per kilogram of spaceflight (as I've said SpaceX is on the verge of doing). Also not as big a deal if you have propellant depots already in space. Trust me - the numbers have been worked out by smarter people than I.
But next technological steps are on the horizon that would allow for much more frequent trips with transit times of about five weeks: VASIMR (Variable Specific Impulsive Magnetoplasma Rocket). Testbeds already exist, and a scale demonstrator thruster will be tested on the space station next year if I'm not mistaken. http://en.wikipedia.org/wiki/Variable_Specific_Impulse_Magnetoplasma_Rocket For manned interplanetary travel, VASIMR would need a large space-rated nuclear reactor considerably larger than have yet been deployed, but not to any absurd degree. And certainly within range if this happens: http://www.technologyreview.com/news/531836/does-lockheed-martin-really-have-a-breakthrough-fusion-machine/ |
Response to True Blue Door (Original post)
Thu Oct 30, 2014, 08:57 AM
BlueJazz (25,348 posts)
2. Good shot of some of the side we don't see.
Response to True Blue Door (Original post)
Thu Oct 30, 2014, 04:51 PM
Judi Lynn (156,999 posts)
7. Wonderful image. Thank you. n/t
Response to True Blue Door (Original post)
Thu Oct 30, 2014, 10:08 PM
lastlib (20,643 posts)
8. There is no dark side of the moon. matter of fact, it's all dark.
(according to David Gilmour, who, I'm sure, has seen it............ :| )
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Response to lastlib (Reply #8)
Fri Oct 31, 2014, 10:41 AM
True Blue Door (2,969 posts)
12. Which is why I said Far Side.
Response to True Blue Door (Original post)
Fri Oct 31, 2014, 07:11 AM
ProdigalJunkMail (12,017 posts)
9. the lighting is wrong... n/t
Response to ProdigalJunkMail (Reply #9)
Fri Oct 31, 2014, 10:40 AM
True Blue Door (2,969 posts)
11. I see what you mean, but if NASA doesn't think it's fake, I defer to their judgment.
China's government is ludicrous, but not that ludicrous.
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Response to True Blue Door (Reply #11)
Fri Oct 31, 2014, 10:58 AM
ProdigalJunkMail (12,017 posts)
13. I wouldn't put it past them...
eh... who knows or cares. soon, china will claim the moon for its own and we will have to ask if we can go back...
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Response to ProdigalJunkMail (Reply #13)
Fri Oct 31, 2014, 11:32 AM
True Blue Door (2,969 posts)
14. Doubtful. Their space program is in no big hurry.
And we've got SpaceX.
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Response to ProdigalJunkMail (Reply #13)
Fri Oct 31, 2014, 09:11 PM
lastlib (20,643 posts)
15. China has signed the 1967 Treaty on Outer Space.
Under its terms, they cannot legally claim the moon for themselves; it is essentially international open territory.
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Response to lastlib (Reply #15)
Mon Nov 3, 2014, 12:40 PM
True Blue Door (2,969 posts)
17. That treaty will be scrapped
the moment any country is in a practical position to violate it advantageously. Such are the realities of economically significant frontiers.
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Response to True Blue Door (Original post)
Mon Nov 3, 2014, 04:42 AM
Warren DeMontague (80,708 posts)
16. Wow. Awesome shot.
Response to True Blue Door (Original post)
Thu Nov 6, 2014, 10:26 PM
Odin2005 (53,521 posts)