Live data from Hacker News

Welcome to a comet

esa.int

51–60 of 87 posts

Re: Welcome to a comet

#51
post #31

From Reddit[1]: "Got fresh news from the team, they are broadcasting live right now on french TV ! Philae landed, and bounced slowly for (1-2-? hours), and travelled 1km away the targetted site. Yes 1000m. Then know this because of the datas from the radar. It's now stopped slanted, some cams are shooting the sky, other the ground, and other nearby rocks, as seen on the first photo. It's inside some kind of cave/hole…

> travelled 1km away the targetted site. Yes 1000m.

Wow, I think this is great luck, that the probe is still on the comet, and even seems to work properly.

Re: Welcome to a comet

#52
post #42
post #18

Earlier quoted context omitted.

805 million means the number is down more than 100 million over the last decade, and 209 million lower than in 1990–92. In the same period, the prevalence of undernourishment has fallen from 18.7 to 11.3 percent globally and from 23.4 to 13.5 percent for developing countries. Source: http://www.fao.org/publications/sofi/en/

Even if it is so (and we can talk for hours on the validity of this or that data) how do you find the fact that there are enough damned means of production to feed everyone and it's been so for decades now? Also how do you like the fact that there are now about 50-60 MILLION people in US that get food stamps. Or the fact that the wages for most of the western world are falling for 30 years now? ... Whatever.

Unfortunately, it is a basic ecological principle that an increase in food results in an increase in population, and humans are not exempt from that. Yes, we have enough food to feed everybody. We have (usually) had enough, not just for decades, but for ten thousand years—ever since agriculture took off, and even more so since the industrial revolution and the Haber process.

However, food production is not enough to eliminate starvation. If you simply transport food to people in an area that can’t support a population increase, all you’re doing is ensuring that there will be more people there to starve in the next generation, and continually increasing costs of transporting food there.

You need to establish local economy and agriculture, or it’s not sustainable. And if such infrastructure can’t be put in place, you need to get people out of there.

Of course, I don’t know how to do that, nor do I know how to solve the economic problems you mention, but that is what needs to be done.

Re: Welcome to a comet

#53
This is exciting. I'm excited.

My reaction to this photo is a little funny. Basically: "Rocks! We have rocks too! Yours look a lot like ours."

I have this desire to find things in common. Like flirting.

Re: Welcome to a comet

#54
This is exciting. I'm excited.

My reaction to this photo is a little funny. Basically: "Rocks! We have rocks too! Yours look a lot like ours."

I have this desire to find things in common. Like flirting.

Re: Welcome to a comet

#55
post #31

From Reddit[1]: "Got fresh news from the team, they are broadcasting live right now on french TV ! Philae landed, and bounced slowly for (1-2-? hours), and travelled 1km away the targetted site. Yes 1000m. Then know this because of the datas from the radar. It's now stopped slanted, some cams are shooting the sky, other the ground, and other nearby rocks, as seen on the first photo. It's inside some kind of cave/hole…

Does the comet have enough gravity to hold on to dust? How do these small space objects even stay together?

Re: Welcome to a comet

#56
post #55
post #31

From Reddit[1]: "Got fresh news from the team, they are broadcasting live right now on french TV ! Philae landed, and bounced slowly for (1-2-? hours), and travelled 1km away the targetted site. Yes 1000m. Then know this because of the datas from the radar. It's now stopped slanted, some cams are shooting the sky, other the ground, and other nearby rocks, as seen on the first photo. It's inside some kind of cave/hole…

Does the comet have enough gravity to hold on to dust? How do these small space objects even stay together?

> Does the comet have enough gravity to hold on to dust?

Yes. Philae's weight on the comet is roughly equivalent to a few ounces/100g* on Earth. It's why there's so much concern about it not being anchored correctly; deploy the wrong instrument and you might push it away from the surface and out into space. So there is a significant gravitational attraction from the comet, just not very much!

* I've seen a few different estimates for this, but it's of this order.

Re: Welcome to a comet

#57
post #10

Does it have a colour camera? or maybe it's a bandwidth-saving decision to transmit only B&W? or because of the lighting?

The pictures taken by Rosetta are BW. From [0]: "Some light contrast enhancements have been made to emphasise certain features and to bring out features in the shadowed areas. In reality, the comet is extremely dark -– blacker than coal. The images, taken in black-and-white, are grey-scaled according to the relative brightness of the features observed, which depends on local illumination conditions, surface character…

[deleted]

Re: Welcome to a comet

#59
post #32
post #18

Earlier quoted context omitted.

805 million means the number is down more than 100 million over the last decade, and 209 million lower than in 1990–92. In the same period, the prevalence of undernourishment has fallen from 18.7 to 11.3 percent globally and from 23.4 to 13.5 percent for developing countries. Source: http://www.fao.org/publications/sofi/en/

That's insane, I had no idea there was any improvement, let alone that much! I just casually assumed the number would be growing along with our total global population, but to know it's actually decreasing as population increases? Wow.

If you're in the mood for good news, 2012 was estimated to be the most peaceful year (percentage of humans to dies by violence) in human (and hominid) history. Slight regression in 2013 & 2014, but still.

The world is big and there are lots of problems, especially when you think of suffering on the scale of millions, but a lot of things are getting better. If you visit some places that are behind on care for orphans, you'll be struck by how foreign it is to see small children begging, stealing and fending for themselves. It doesn't exist in many many places, but you don't have to look more than 2-3 generations before you'll find widows and orphans being a big, huge societal problem. Supporting widows and orphans was often synonymous with charity, "righteousness," and similar. That holds true from the early 20th century back to the beginning of written records.

China is a big part of the high speed exodus from absolute poverty, for all that is wrong with it politically.

The instinct to reject the notion that we are improving on the grounds that there is a lot left to do doesn't come from a bad place. Each life is an entire world of potential, suffering, happiness and love. That makes it hard to quantify. A million people hungry is an unfathomable amount of suffering. Empathy and solidarity are some of our most redeeming qualities. In my opinion, so is exploration. All that said, it's important to know the achievements that have been achieved. There's a bad way of knowing them, self congratulatory nationalism is a terrible one. There are also a good ways. If nothing else, we need to know if we should keep going.

Re: Welcome to a comet

#60
post #4

Also very interesting, if you look at the high-res picture and zoom at the bottom right, you'll notice some sort of cable on the ground/boulder. This could be the cable from one of the harpoons that may have fired but didn't anchor themselves, or it could be a feature attached to Philae that's in the field of vision.

That's one of the audio cables from the sound stage. If you look closely you can see the shadow of a boom mic on one of the rocks.
Post reply on HN