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[Business Insider] Humans Just Got Our First Close-Up Look At A Comet And It's Mind-Blowing - Page 16

post #151 of 158
It probably made a lot more than that back in the long run.
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post #152 of 158
Quote:
Originally Posted by iSlayer View Post

Lol

OCN, at the forefront of technology and stuck in the 1800s on all things social.

http://en.wikipedia.org/wiki/Gerald_Grosvenor,_6th_Duke_of_Westminster

Ha ! It's way older than that....

dunx

P.S. He's worth $11.4 billion.... because his relatives got lucky a millennium ago... applaud.gif
Edited by 2002dunx - 10/19/14 at 8:51am
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post #153 of 158
A giant space snowball isnt that mind blowing
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post #154 of 158
Quote:
Originally Posted by Tadaen Sylvermane View Post

All I think when I see this is how many starving people could have been saved or homeless pulled off the streets with the money spent on going to examine a rock that we won't actually be able to do anything with for 50+ years anyway minimum.

I would argue that USAs budget should favor space more than military (Military do not help starving people either)

For reference

post #155 of 158
Quote:
Originally Posted by galaxyy View Post

I'm an astronomer by vocation, so I'm biased but your argument doesn't really work for a few reasons.

  1. In the US, we already spend much more on social program than we do space research
  2. Poverty and hunger are near impossible problems to completely eradicate. At what point are we allowed to spend money on pure research? If we use your logic, we'd still be in the stone age!
  3. Money spent on this program employs a lot of people
  4. There are tangible benefits from these programs, this isn't just butterfly collecting. Take a look at NASA's list of spinoff technologies.

edit: As others pointed out, why don't we stop building bombs before we stop reaching for the stars

QFT
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post #156 of 158
Quote:
Originally Posted by Tadaen Sylvermane View Post

All I think when I see this is how many starving people could have been saved or homeless pulled off the streets with the money spent on going to examine a rock that we won't actually be able to do anything with for 50+ years anyway minimum.

Dude not even close to the amount people spend on idiotic wars.
post #157 of 158
This is like telling a multi-core CPU "Why not launch this program first before starting the other one?" The CPU would be like "Duh, I can do several things at once". And the program you wanted to delay would only consume 1% of the process anyways.
post #158 of 158
Quote:
Originally Posted by Bit_reaper View Post

I wonder if its actually possible to get an stable orbit around that thing considering its asymmetrical shape thinking.gif

Even in the Moon, there're some kind of "distorsions" in the gravitational field due to the mantle density being different in some places, making it vary a bit, and therefore making the orbits of crafts arround it difer among time.

Nasa's GRAIL mission was a set of probes sent 2 or 3 years ago with the only pourpose of meassuring those anomalies.

http://ottawa-rasc.ca/wiki/index.php?title=Hanmer_articles_Moon_GRAIL_Gravity

Check this gravity map of the moom just as a small example



So, resuming, its nearly or totally impossible to round the moon two times having the same apoapsis and periapsis without turning on the engines. Although this orbital decay is too weak to be something missions have to worry about thumb.gif

Same can be said about 67P, but also adding the weird Potato + Ball shape to the ecuation which makes its gravitational forces even weirder.
Altho that comet has a gravitational force of arround 0.0001443 m/s^2 +-10% on its surface, thats nearly nothing, just to put things into place, Philae weight here in earth would be arround 100Kg, on the comet that's just 10 grams. And at that 15 mile orbit which Rosetta is, the gravitational forces are even weaker.

Rosetta orbits the comet quite slowly, 1m/s is a really really slow orbital speed, I guess they arent really orbiting the comet the way we would think off, but rather making small burns to correct the trajectory periodically to avoid crashing with the comet due to low speeds and to avoid going too far from it due to high speeds and/or gravity field changes.

EDIT: Found this video:

Edited by danilon62 - 10/20/14 at 2:58pm
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