ESA to Send Spacecraft to Venus 195
teeto writes to tell us The International Herald Tribune is reporting that the European Space Agency is planning to send a spacecraft to peer at Venus." From the article: "If the robot craft pulls off the complex maneuver of slowing down enough to swing into orbit, scientists hope it will help solve the mystery of how the shrouded, churning atmosphere of Venus formed and how it maintains the planet's broiler-like temperatures."
Didn't you hear? It's GLOBAL WARMING (Score:4, Funny)
Re:Didn't you hear? It's GLOBAL WARMING (Score:5, Interesting)
Do we have any way of knowing how long Venus has been a runaway greenhouse? (That phrase, by the way, invokes a really bizarre mental image
Is it conceivable that the climate there went haywire within human history? Given the current pressure, temperature, and chemical composition of the atmosphere on Venus, is there any chance that any indications at all could have survived of a possible former ecosystem there?
Mars is fascinating for what it might have become. Venus is fascinating for what it might have been.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2, Informative)
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
I know Earth had an atmosphere of Amomnia when it was first created. Perhaps Venus had this and the extreme had broke down the Amonia and combined the elements with sulfur and carbon dioxide to form its hellish atmoshpere?
I wonder if Earth will turn into another Venus when teh sun expands and begins to warm our planet up?
Re:Didn't you hear? It's GLOBAL WARMING (Score:3, Funny)
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Re:Didn't you hear? It's GLOBAL WARMING (Score:5, Funny)
Wild, dude. BTW, pass that bong to me when you're done with it....
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Wilder yet, what if there's been civilizations before our current one? Homosapiens is estimated to be what, up to 300k years old and the oldest sigs we have of civilizations past are piles or rubble that was a city 8k years ago. Say there was a huge, thriving civilization 50k years ago? There would be nothing left of it by now. Who knows what wonders could lie in our distant past?
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Earth's own past is gloomy enough to warn us (Score:5, Interesting)
Almost from the get go. From what I've read, Venus has simply way, way too much Carbon Dioxide. Carl Sagan's romantic plan of seeding Venus with bacteria to eat up the CO2 simply fails because there is way too much CO2. To get Venus straightened out for human habitation, you would have flat out get rid of something like 89 parts out of 90 in the Venutian atmosphere, and there's really no place to put that much air. There've been some proposals to freeze it into giant CO2 chunks and launch them into space, or, slam some kind of an asteroid or even planet into Venus to jack the air into space, but both are so far beyond our technology as to be unimaginable. There's also not enough of other gasses in Venus's atmosphere - you really need a lot of nitrogen or something like it, like, well, the Earth has.
Then again, the Earth has an aweful of lot of Carbon Dioxide in the oceans and the limestone.... maybe we could all be doomed.
Is it conceivable that the climate there went haywire within human history? Given the current pressure, temperature, and chemical composition of the atmosphere on Venus, is there any chance that any indications at all could have survived of a possible former ecosystem there?
Well, there's one famous Internet crackpot that swears he sees Zeppelins on Venus and there are people there...and NASA is covering it up. But, outside of that, I think Venus has always been dead. Venus has a lot of problems even besides the grueling atmosphere. It has a long rotational period and lacks a magnetosphere.
As far as the earth goes, the most spectacular environment catastrophe posited is Snowball Earth [wikipedia.org]. Basically, the entire Earth was frozen over with a sheet of ice two miles thick, everything died and there was no oxygen in the atmosphere, for a period of a few hundred million years. It was a rough time, but, ironically, the Earth was saved by an accumulation of 350 times our present level of CO2.
What's really interesting about Earth's past is that the atmospheric composition has varied rather wildly. It is not at all automatic that we have 78% nitrogen, 20% oxygen and then some other gasses. I have no idea how they infer atmosphere, but it must have something to do with chemicals found in rocks and knowledge of how those chemicals must have been made, coupled with radioactive dating. Incidentally, the overall portion of CO2 in the air is rather small, something like 0.04% (and going up). For all the talk about whether the CO2 is manmade or not, or whether it causes global warming, some facts are most certainly known. First, the CO2 level has doubled in a 100 years, and when a planet wide change happens that fast, you really do have to have cause for concern. All sorts of questions need to be asked, but the big one is, is the rate of doubling changing? Like, will we double it again in 50 years, then 25 again, and so on? I think we only need to double the atmosphere not too many times before we all die.
Re:Earth's own past is gloomy enough to warn us (Score:4, Funny)
Before that, they darkened the skies with CO2 in an attempt to destroy the computers.
Regarding the Zeppelins, maybe the Venutians are highly advanced (or the AI is) and if we were to go to war with Venus, we'd lose and be turned into batteries in an instant. NASA knows this and tell us that there is no life on Venus because we can't risk being turned into batteries. This is also why stories of Martians or far more prevalent than stories of Venutians kicking Terrans(or Earthlings) ass; to take away the focus.
Re:Earth's own past is gloomy enough to warn us (Score:5, Funny)
Re:Earth's own past is gloomy enough to warn us (Score:2)
Pipe it over to Mars, and kill two birds with one stone?
Mars and Venus, and Spaceballs (Score:2)
Mars is male. When you get to Mars, switch from suck to blow.
Re:Earth's own past is gloomy enough to warn us (Score:2)
That's one hell of a flexible pipe
Comment removed (Score:4, Interesting)
Re: (Score:2)
Re: (Score:2)
Re:Kim Stanley Robinson needs a few science course (Score:2)
Your mean, like, normal people, like the people who went to the moon [nasa.gov]?
A mars colony built with robotic equipment sent from earth, plus for bonus, an orbital teather (10^12 dollars or more before I put the book down)?
How else would you build it? We are planning a tether on Earth now, which is at least three times as hard.
A frontier society that finally 'gets it together' and makes socialism wor
Re:Earth's own past is gloomy enough to warn us (Score:4, Insightful)
Or live above the clouds. Air is a lifting gas in the current Venusian atmosphere.
Re:Earth's own past is gloomy enough to warn us (Score:4, Insightful)
This is almost certainly mistaken, simply because there is no evidence of any extinction - everything didn't die! And unless there was at least some open water to allow gaseous exchange, everything beyond bacteria would probably have died. So, the idea of a totally frozen Earth is not feasible.
Re:Earth's own past is gloomy enough to warn us (Score:2)
I recall seeing a science program that said that the majority of Earth's CO2 is tied down
CO2 in Venus and Earth nearly equal (Score:2)
Venus's atmosphere has ninety times the CO2 as does earth. Its not know whether Venus has much in the way of carbonate rocks. But if it doesnt have plate tectonic and ocean to recycle the carbon, its probably not much.
Re:Didn't you hear? It's GLOBAL WARMING (Score:4, Insightful)
My guess, if it had oceans, the 59 days of straight sunlight would cause them to boil away. With the oceans gone, the surface would bake and scorch sending more gases into the air.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
It's very fortuitious.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
The study was partially discreditted, something about certain exstrenal ques giving them a pattern of 27.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
The reason we're adapted to a 24 hour day is because earth has always had a 24 hour rotation period (more or less anyway, since IIRC it's slowed down slightly over many millions of years). It's simple evolutionary biology - we have X time per day to take advantage of, and thus we have become adapted to that many. If earth had a 40 hour day, we'd have adapted to that instead.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
So basically, only reason humans are "24 hour cycle" creatures is because this is the environment that we evolved in. As the day lengthens (assuming we're still here), we'll adapt to that as well.
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Is it conceivable that the climate there went haywire within human history? Given the current pressure, temperature, and chemical composition of the atmosphere on Venus, is there any chance that any indications at all could have survived of a possible former ecosystem there?
There is no evidence that Venus climate has changed recently. But the planet may undergo extreme resurfacing [ox.ac.uk] periodically due to the apparent lack of plate tectonics and high heat flow. The surface may liquify every few 100 Myr. This
Re:Didn't you hear? It's GLOBAL WARMING (Score:2)
Men are from mars, women are from Venus (Score:3, Funny)
Re:Men are from mars, women are from Venus (Score:2)
Re:Men are from mars, women are from Venus (Score:3, Funny)
wait a minute... (Score:5, Insightful)
Apparently we humans are rejects from two worlds...
Re:wait a minute... (Score:2)
Re:Men are from mars, women are from Venus (Score:2)
Title is misleading (Score:5, Informative)
Couldn't resist (Score:5, Funny)
Now that's some good engineering!
Re:Couldn't resist (Score:2, Funny)
Re:Couldn't resist (Score:2)
Relax! (Score:2)
Re:Title is misleading (Score:2)
Hi nacnud75 :)
Would you know who won the World Series in 2006 ? Just curious ! Thank you !
Re:Title is misleading (Score:2)
Apparently the reporter didn't understand the difference between lithobraking and aerobraking.
Re:Title is misleading (Score:3, Funny)
Send? How about "sent"? (Score:5, Informative)
See here:
http://sci.esa.int/science-e/www/area/index.cfm?f
The thing is due to achieve orbit in a few days.
Re:I nominate a new kind of troll! (Score:2, Funny)
If you were a Nazi, you'd be tense too. All that "sig heiling" and ethnic clensing is really stressful...
Re:I nominate a new kind of troll! (Score:2)
I dunno (Score:2)
Venus storm footage (Score:5, Interesting)
I just think that'd be incredible. Until everything melted.
Re:Venus storm footage (Score:2, Interesting)
The same mechanism that makes the earth's sky blue (wavelength dependant scattering of light) would, on Venus, scatter visible light to a much higher degree due to the density of the atmosphere. You wouldn't be able to see very far unless you used false-color imaging from the infrared or perhaps microwave parts of the EM spectrum.
Bummer.
Re:Venus storm footage (Score:5, Informative)
this must be about the limit then... (Score:5, Informative)
It has a horizon and due to the extreme fisheye it is perhaps difficult to tell just how far the horizon is, but it appears to be perhaps 10 meters or a bit more.
http://www.mentallandscape.com/V_DigitalImages.ht
Re:this must be about the limit then... (Score:2)
Those pictures leave me wanting to reach out and raise the camera :)
The surface appears unnaturally flat in all the images, with rocks flush with the surface. It looks strange because we are used to images from mars and the moon which have low gravity and less atmosphere.
But setting that aside these pictures actually look more like earth than pictures from other planets. The heavy weathering seems characteristic of Earth.
Re:this must be about the limit then... (Score:2)
Metric vs SAE (Score:5, Funny)
<Mission control> Spacecraft 1, you are currently 1300 rods from impact, at a fuel consumption rate of 4 7/16 hogshead per mile. Be advised.
<Spacecraft> WTF?!
Re:Metric vs SAE (Score:2)
Re:Metric vs SAE (Score:3, Funny)
Re:Metric vs SAE (Score:2)
Girls are from... (Score:2, Funny)
Huh, I guess now that the space rovers on Mars failed to find any men, the geeks over at NASA are wondering if they'll discover any specimens of so-called "girls" on Venus...
Who knows, after this we might even get to understand how they work...
Leave the poor thing alone! (Score:5, Funny)
Stop planet Abuse now!
An interesting change from Mars, to be sure... (Score:2, Insightful)
Re:An interesting change from Mars, to be sure... (Score:4, Informative)
Since the Magellan probe (which someone else already pointed you to), we've known more about the surface of Venus than we have about the Earth (oceans get in the way). Mars has been similarly mapped within the past decade or so, thanks to various orbiters. Mercury is something of the bastard child of the inner solar system; there's a probe on the way now, but the best we have is from a Mariner 10 fly-by that photographed most of one side of the planet before most of us were born.
Pluto... we're not even all that sure there is a "surface," at least for half of its orbit.
Re:An interesting change from Mars, to be sure... (Score:2)
Pictures from the surface of Venus (Score:5, Informative)
Venera 9 [mentallandscape.com] sent image telemetry for 50 minutes. It scanned 174 of the panorama from left to right, and then 124 scanning right to left.
They drilled, photographed, and used penetrometers on the surface. Each mission lasts a few hours to days before the atmosphere crumples the spacecraft like a soda can due to the pressure. Much different than life on Mars!
Terraforming (Score:2, Interesting)
Why??
I look at the gravity situation and I really can't understand why people focus on Mars. Really. Does anyone ever look at the surface gravity of Mars before they start talking about terraforming it? It's only 38% of Earth's! (Compare that with freaking Mercury at 28%, or even the Moon at about 17%. ) What
Re:Terraforming (Score:3, Insightful)
Re:Terraforming (Score:2)
Re:Terraforming (Score:2)
The long day (and lack of water) might be solved by smashing icy astroids into venus at just the right angle to get it to spin (taking enormous amounts of energy... but possible). Once the spin is sufficient we coudl use bacteria/nanobots to convert the c02 into carbonate formes and the increases rotation might cause a Magnetosphere to form? I'm not eve
Re:Terraforming (Score:2)
You have a point, but I think it's clear why people don't think of Venus as a suitable planet: from every description, the surface of Venus sounds exactly like the description of Hell. Who would want to live in Hell? Mars, on the other hand, just looks a bit rocky and barren (you can't see the lack of gravity or atmosphere in the pictures). Granted, with sufficient terraforming they could both be completely different, but in the popular imagination, Mars looks a
Re:Terraforming (Score:2)
Re:Terraforming (Score:2)
Of course, that begs that question if doing that, would cause issues with Mars. Mars is supposedly on a teeter-toter WRT to CO2 and Water/Ice. If the global temp drops several
Re:Terraforming (Score:3, Interesting)
We
Re:Terraforming (Score:3, Informative)
There are several reasons but two biggies;
1 - Suit and machinery design for Mars are overwhelmingly easier. (Think Mars = suburban backyard. Venus = two feet under flowing lava on the bottom of the Marianas Trench.)
2 - No
Re:Terraforming (Score:2)
After the asteroid hits the surface hopefully much of that atmosphere would get ejected into space. Now I'm not saying that afterwards it would be simple to terraform but after the impact (and of course waiting some time to see how the planet takes it) it might be easier.
Plus....planetary scientists would LOVE to see what
Re:Terraforming (Score:5, Insightful)
Propose your choice of terraforming technique. Convert one chemical into another, physically remove the atmosphere, don't care which you choose, really.
Now, compute the energy requirements of your terraforming action.
Then you shall achieve enlightenment.
In short, terraforming Mars for a geologically brief period of time is on the tantalizing edge of feasibility, because a lot of it would involve slightly nudging comets and such to hit Mars. That's a net gravitational energy reduction, and we might be able to manage that. Even so, it might not work; I think it far more likely you'd have to build enclosed settlements, or perhaps even more likely, modify life forms to live on Mars basically as it is, possibly with some resources augmented by the aforementioned comets. But to get from Venus as it is, to a Venus we could walk on, would take an astronomical amount of energy no matter how you slice it. (A rather small "astronomical" amount of energy as such things go, but "astronomical" nonetheless.) It's one of those things that by the time we can do it, we'll probably have better uses for that sort of energy.
By the way, I'm actually-factually talking about energy states, in the technical thermodynamic sense. It's not a matter of waiting for "science" to wave a magic wand; any 'science' that can re-write the laws of thermodynamics is well beyond anything we can speculate about. Conservation laws are about the strongest physics results we have.
Re:Terraforming (Score:5, Interesting)
So the energy is there. But it isn't necessarily easy to use. The only plausible scenario probably remains some kind of biological seeding, i.e. designing some kind of photosynthesizing microbial life that can suck up all that CO2 and convert it to carbonate rock, as such life is thought to have done in the early history of the Earth, which is where our CO2 went and why we have great beds of limestone in the crust.
But I believe the problem with this is that there is very little water in the Venusian atmosphere, and all the microbial life we know about needs water. Furthermore, such a seeding process would not be quick -- at a minimum, millions of years are necessary -- and it might be hard to put the brakes on at the end.
Re:Terraforming (Score:2)
Try this for a right answer. Living here on good old mother earth, we are quite concerned about a possible 0.02% change in the CO2 concentration of the atmosphere. Apparently it's a problem, yet, by bringing all of the resources of the planet together, we dont have an engineering solution to solve this trivial little detail.
Now you guys are talking about manufacturing an atmosphere from scratch, or changing 99% of the com
Re:Terraforming (Score:2, Informative)
right here in this here paper is where it is.
http://powerweb.grc.nasa.gov/pvsee/publications/ve nus/VenusColony_STAIF03.pdf [nasa.gov]
From the link:
Abstract. Although the surface of Venus is an extremely hostile environment, at about 50 kilometers above the
surface the atmosphere of Venus is the most earthlike environment (other than Earth itself) in the solar system. It is
proposed here that in the near term, human exploration of Venus could take place from aerostat vehicles in
what's so special about 9.8 m/s^2? (Score:3, Insightful)
What's wrong with having only a third of a gee or so of gravity? From the point of view of building structures, it's a boon. You have enough gravity to keep stuff in place, and allow conventional building techniques (unlike in orbit), but you can mak
Re:Terraforming (Score:2, Interesting)
There's a small problem with this part of your logic. We don't need to just destroy the current atmosphere, we need to engineer an atmosphere similar to ours. You're right that it probably wouldn't be terribly difficult t
Er, space? (Score:2)
alas, space is not as "cold" as it sounds (Score:5, Interesting)
The reason for needing this kind of effort to cool the Space Station, even thought it's in the "very cold" environment of space, is that while the temperature of space is very low, the thermal capacity of space is also very low. That is, there's just very, very little of any cold matter around to which you can transfer heat, the way your body transfers heat to winter air when you step outside in December. You can radiate heat as infrared radiation, of course, but to be efficient this requires a lot of surface area for the volume being cooled. And yet, of course, when you build spaceships you tend to want to minimize the surface area for a given volume -- i.e. build compact shapes.
Furthermore, in space the wretched Sun is radiating huge gobs of light and heat at you 24 hours a day. Got to get rid of that, too.
Re:alas, space is not as "cold" as it sounds (Score:2)
Yes, this information was on the internet (Usenet, I believe), in 1993/4. I've so dated myself...
Wrong context (Score:2)
In the case of Venus, we have the luxury of actually wanting to get rid of a large amount of the atmosphere. That's the physics taken care of - the rest is just technology. And don't bother me with implementation details, I just do the big thinking!
Re:alas, space is not as "cold" as it sounds (Score:2, Interesting)
Re:alas, space is not as "cold" as it sounds (Score:2)
Re:Terraforming (Score:2)
Re:Terraforming (Score:2)
Re:Terraforming (Score:2)
Mars (Score:2, Funny)
yea i can see why they want to peer (Score:3, Funny)
http://www.sunspiritgallery.com/images/venus.jpg [sunspiritgallery.com]
Television (Score:5, Informative)
http://science.discovery.com/tvlistings/episode.j
Pressurize the probe before launching it! (Score:2)
Unless of course your goal is to make it somewhat resistant to any men who cost about 67 million pesos [imdb.com], in which case do not pressurize it beforehand ...
It figures.... (Score:3, Funny)
Europe's already been to Venus (Score:2)
We're leaving together
But still it's farewell
And maybe we'll come back
To Earth, who can tell
I guess there is no one to blame
We're leaving ground (leaving ground)
Will things ever be the same again
It's the final countdown...
The final countdown
Ooh oh
We're heading for Venus (Venus)
And still we stand tall
Cause maybe they've seen us
And welcome us all (yeah)
With so many light years to go
And things to be found (to be found)
I'm sure that we'll all miss her so
It's the final countdo
Nasty Swedish hobbitses.. song burns us it does.. (Score:2)
Thank you so very much for reminding me of that song.
It took me four years off and on to purge it from my cerebral cortex with a Brillo pad. All for naught.
I hope RuPaul covers this song someday, and that the new version haunts you to the end of your days, like a curiously tall diva wailing in the eternal night.
Re:Beware of Unicorns (Score:2)