Re: Cat food?
And what about baby food?
(cue Soylent Green comment)
2493 publicly visible posts • joined 27 Apr 2007
Rock to the beat, you say? Might I humbly suggest the following....
"...which allowed things like six-foot dragonflies to exist. This sounds very nice, but I suspect the four-foot cockroach and the two-foot ant would be a concern."
Dragonflies generally do have six feet. Personally I'd prefer cockroaches with only four feet, they'd be a bit slower and therefore easier to stomp on. An ant with two feet would have serious trouble carrying twenty times its own body weight and this could lead to problems with numerous ecosystems which rely on ant's garbage disposal work.
"L2 is a spot where the gravity of sun and Earth will keep the spacecraft in a stable orbit in Earth’s shadow."
Except that it's not in shadow: L2 is too far away from Earth for the Sun to be hidden behind Earth. L2 sees a bright ring of Sun around Earth all the time, a permanent annular eclipse. L2 is in Earth's antumbra.
Abundant wifi hotspots could solve this "problem".
Here is an idea: carriers can stop adding more cell towers in cities and instead add wifi hotspots in high-people-density locations: surely it must be possible to have a system where all users of CarrierX connect automatically to all of CarrierX 's hotspots and get the data charged in the same way as data passing though a cell tower. It won't matter then if your phone/tablet happens to be near a rural/suburban cell tower or a town/city hotspot, your surfing experience is the same, and there's plenty of bandwidth.
Or have I missed something?
"The interesting thing would be if you could place a mini sat in geo synchronous orbit over the target."
Firstly: I think you mean "geostationary", because any other "geo synchronous orbit" moves around and doesn't stay over the target.
Secondly: it costs a bloody fortune to get something into geostationary orbit, because geostationary orbit is so very very very high.
Thirdly: picture resolution of the target will be terrible, because geostationary orbit is so very very very high.
Fourthly: geostationary orbit is over the equator, which is fine if the target happens to be on or near the equator, but is increasingly useless the further the target is from the equator.
"a kilogram is the weight of a volume of pure water 0.1m x 0.1m x 0.1m. The trick is getting pure dihydrogen oxide, of course"
And because that was the original real definition of a kilogram (the current reference kilogram made of platinum and iridium is only an approximation of this) we have a simple way of defining a proper kilogram by mathematical means: calculate how many dihydrogen monoxide molecules fit into one litre and multiply that number by the mass of one molecule.
The main problem with bushfires down under is radiant heat. This radiant heat will kill a person in seconds and cause metal to melt and nearby wood to burst into flame. A few hundred metres without trees exploding into flame will drastically reduce the radiant heat at the building, saving the building and its occupants. Fortunately the radiant heat problem doesn't last long, only a minute or two as the main flame front passes: shelter inside during that time and you'll survive (be careful though, it arrives very suddenly, so go inside early because getting caught out may well be the last mistake you ever make).
The second biggest problem with bushfires down under is ember attack. Fortunately this can be dealt with by proper preparation (e.g. clearing leaf litter from gutters, removing combustible material from next to the building etc) and by post-main-fire-front mopping up of ember fires with a bucket of water.
p.s. I used to wear the uniform and hold the hose and have felt the heat.
The whole "since 1998" thing is a problem because that's only a short period, whereas climate change (if real) would be a long term thing. So, instead of cherry-picking "since 1998" let's look at a much longer time period.
"Could we use him to knock Apophis into a different orbital plane, thus ensuring that it would only cross our path once every several thousand years?"
Yes, but he'd have to hit Apophis from above/below the current orbital plane, which means we need to accelerate him two times: the first to move Bruce above/below the current plane (this can be a smallish acceleration), the second for the big hit to knock Apophis into a different orbital plane. TBH once we have the tech for the second acceleration then the first should be fairly trivial.
All in all it would be a moving experience.