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I think the biggest argument against sending a Dragon around the moon and back to Earth--unmanned or manned--is that it would undercut the justification for Orion and the SLS, and I doubt Musk wants to get a lot of people mad at him. If I were he, I'd avoid missions that SLS and Orion might be tasked for in the near future. It will be obvious enough that Orion and SLS are overpriced soon enough without that fact being rubbed in people's faces.
SpaceX doesn't profit from use of the Orion, why would they want to help their competition?
The delta-v to land on the moon is something like 2.3 km/sec from Earth. You burn off 0.7 km/sec to go into orbit, then 1.6 km/sec from orbit to landing. In non-metric, the escape velocity of the moon is about 5,000 mph and its orbital velocity is about 3,500 mph. These are off the top of my head.
The only way a Dragon can land on Europa is with a larger delta-v than it currently is capable. The escape velocity of Europa won't be hugely different from the moon; it'll be somewhat less, but not a lot less. There's also jovian orbit insertion to consider. If Musk says that's possible, he must be thinking of a Dragon with more delta-v.
A Falcon Heavy can put 54 tonnes into LEO and supposedly can send 15 tonnes to the moon. Maybe they can add an additional stage on top of the second stage; two second stages, for example.
The other thing to remember is that the Falcon Heavy can now put 54 tonnes into LEO WITHOUT crossfeed capability because the larger Falcons have 60 percent more capacity (25 tonnes to LEO, I think). The earlier design could put 53 tonnes into LEO with the smaller Falcons, which each could lift 15 tonnes to LEO. If the earlier design could lift 53/15 = 3.5 times as much as an individual Falcons, does that mean the new Falcon Heavy could lift 25 x 3.5 = 88 tonnes to LEO with crossfeed capabilty? If so, the Falcon Heavy is potentially more capable than the SLS. That's another reason to eliminate crossfeed capability, at least for now; to keep NASA political supporters happy. I suspect the Falcon Heavy has a lot of potential in its design that hasn't been revealed yet.
This idea is a simple rocket hopper, includes a nuclear reactor. First you compress and liquefy carbon-dioxide from the atmosphere, then that serves as the reaction mass for the Nerva rocket. You can fly from one point on the planet's surface to another very quickly, and certain designs might also achieve orbit.
Kind of depends on how much money he can make launching rockets for other people, that would be his budget in making this happen. If he can undercut his competitors with that reusable rocket, he could have a nice fat profit margin for a while.
The conventional wisdom in the space community is, if you want something done, get the government to do it!
Thing in the middle is MCT on top of BFR. But... At the moment there is no official news about MCT, so take everything you see with a grain of salt. This is 'fan-made' graphics, from educated guesses. The nuclear symbol is there because a lot of people think Musk will need either nuclear propulsion or power generators.
(He will *not* have these available, there is no way in hell he can get his hands on those in such a short timeframe in a legal way.)What I read is MCT will be launced as an 'empty' second stage on top of BFR, and 'filled' by two consecutive BFR launches (mainly propellant) and initially some Dragon2 for a skeleton crew in LEO before TMI
So basically it is a "Nova Rocket" with a nuclear upper stage and perhaps reusable lower stages. Have I got this right? He'll need a larger vehicle assembly building than the one NASA has!

Is that thing in the middle the Mars Colonial Transporter? is that a nuclear symbol I see on top?
To the left is a profile of a Saturn V, so basically its about the size of a Nova Rocket, maybe with a nuclear upper stage if I'm interpreting this correctly, am I? Unfortunately I can't read the text in that diagram.
Tom, you know better. I will say: "Read what I wrote." But I doubt you're as stupid as your last post implies. You're trying to win an argument by playing stupid. But this is a forum of intelligent, informed people. Here you don't win by being stupid.
I call it using logic, you argue that Marijuana should be legal because its not as addictive as tobacco, but I listed a number of things that aren't addictive, and people are free to smoke crab grass, maple leaves and dandelions, so why don't they, they are nonaddictive?
How about unicycles on Mars, or a pogo stick? Bet you could bounce pretty high on Mars using a pogo stick, do you think astronauts should use those to get around? How about we fit astronaut's boots with roller skate wheels, or how about bringing a skate board to Mars. Finally, what if we build a spacesuit for a horse, and brought that and the horse over to Mars for an astronaut to ride on? Which one of these ideas are bad?
I can see some problems in getting a horse inside a capsule, the astronauts might not like the smell or sharing their living quarters with a horse. I think a dog space suit is much more feasible.
If Marijuana wasn't addictive, there would be no reason to grow it. How come people don't grow dandelions to smoke? How come people don't smoke crab grass? How come people don't smoke maple leaves?
I never said I didn't want ISRU, I said it was not required to mount a very effective and affordable expedition.
Add effective high-rate production of mass quantities of an appropriate propellant, and you can refuel the landers on the surface. That lets you bring down a lot more tonnage one-way. You can also fly suborbitally to yet more sites. Any of that just adds huge bang-for-the-buck. But you still want to get a credible and beneficial mission done, even if your ISRU doesn't quite pan out the way you wanted. So you plan a baseline without any ISRU success, so it just gets better from there, if you do have success.
I will say this: it takes many tons of propellant to fly a practical vehicle back to low Mars orbit. ISRU production rates of kg/month will not be an effective or useful supply for expedition flight operations. It's got to be tons on a time scale of weeks or months. If you can't do that, then you must let the "factory" run automatically for years ahead of the expedition to build up a useful supply. That risks two serious problems: (1) boiloff losses, and (2) the precision landing problem.
Rxke is right, ISRU requires a lot of electricity. It's got to come from somewhere. Solar is weaker in intensity at Mars, but less interrupted by weather conditions. Some combination of PV panels and reflectors for some concentration might work pretty good. As cold as it is, there less overheat risk from mild concentration of sunlight. Such might get around the government monopoly on nuclear power items. At least it's a possibility to look at.
GW
What's the problem with precision landing?
The more I learn about Gary Johnson, the less I like him, he smoked Marijuana and he runs a company that sells the stuff! Drug addiction is not freedom!
I believe allowing the North to win, only encouraged other enemies to attack us later, say on September 11, 2001. If we let the enemy win once, then other enemies will think they will stand a chance against us and attack! Even if you think our involvement in Vietnam was unjust, it would have been better for us to win that "unjust" war, than to give future enemies the idea that they could beat us if they just drive up the causalities high enough. Which is why we must crush ISIS and other such enemies! Now I'm not interested in restarting the War in Vietnam, if there are people in Vietnam who want their freedom, they can fight for it themselves, but in the future, if we get ourselves into a war, we should win it no matter what! We need to defeat the enemy who ever it happens to be, so we don't have this post-Vietnam effect of enemies attacking us thinking they can beat us. Us pulling out of Vietnam without winning it set a bad precedent and it endangers many American lives. If we get into another such war, we need to win it! Question the war, argue about what we should have done after the war is over with.
It is NOT required to have in-situ propellant production in order to have an affordable manned Mars mission. Too many still believe it is required. But it is not.
Take a look at my orbit-to-orbit transport with reusable one-stage chemical landers. I estimated about $50 billion to get this done, not NASA's/Big Space's $500 billion. It presumes nothing is produced at Mars in the way of propellant. Yet I got up to 8 different sites explored from LMO, with an orbit-to-orbit transport vehicle that gets recovered in LEO for reuse.
That's getting kind of hard to argue with, actually. Especially when the very same recovered transit vehicle works for missions to Mars, Venus, Mercury, and the main asteroid belt, as well as the NEO's. All you need is the appropriate lander for Mars and Mercury. The other destinations do not require a lander.
GW
Why wouldn't you want in-situ propellant production, what are the advantages of not having it? Should we not use solar energy as well?
My own opinion is that geography is a lot less important than water for the very first manned site on Mars. Any sort of terraforming considerations are a long, long way off. If you have water, and you have electric power, you have hydrogen and oxygen, with carbon available in the CO2 atmosphere. You can make LOX-Liq.methane propellants, and/or LH2-LOX propellants. Given a source of nitrogen (I know not where) you could even make very storable NTO-hydrazines.
You also need water to support growing food, and the excess oxygen from splitting water at 8:1 to LH2-LOX propellants at 6:1 is what you need to breathe. Water is the key thing, bar none! On Mars, ice away from the polar caps is buried. There seems to be "massive deposits" of buried ice in some mid-latitude locations. We won't know until we go and drill (I ethically refuse to bet lives on remote-sensing inference).
You site your settlement where the ice is. There is no other realistic choice. And you must know it is really there before you bet lives on it. So where's the rover with the drill rig that can reach 2-10 meters down?
Atmospheric radiation shielding is important for long-term residents, but not short term exploration crews. The issue is eventually career limit exposure for long term residents. Although, habitats can be built with regolith on their roofs for extra shielding. The radiation shielding problem is no real determinant of the first settlement site.
Low atmospheric density at higher elevations is no real site determinant, either. Anything big enough for men to use will likely mass well over 1 ton. Stuff over a ton is what all the EDL fuss is about. The answer to that fuss is retropropulsive final landing after you come out of entry hypersonics. It'll be too low for chutes to be useful, even in the lowlands.
GW
How much hydrogen do you need to support a colony? 1 kg of hydrogen makes 5 liters of water, then you just recycle the water. I think we are quite capable of moving water from where it is to where its needed. I think we should site the colony near interesting land features, water can be supplied where ever the colony is.
I agree with Tom on all points.
(I never dreamt I'd ever say that
)
Second: starting your inital building efforts at the lowest possible altitude has the risk of eventually having your initial outpost being inundated decades later by terraforming.
Probably some Earth bound cities on the coast may have to be abandoned too if global warming people are right, of course with sufficient investment, they could be turned into "Aquapolises." I don't know how inevitable global warming on Earth would be. Seems to me any society capable of terraforming Mars would have no problem averting global warming, that is where I disagree with the Premise of Kim Stanley Robinson's Red Mars, Green Mars, Blue Mars trilogy, yet he wanted to showcase the problem of global warming in his third novel, I just say in a world where Mars is terraformed, global warming would have been solved using some of the same techniques used to terraform Mars, that Soletta, for instance, could just as easily have been used to block sunlight as to magnify it! One phase of the terraforming project called for placing a soletta between Mars and the Sun to magnify the Sun's rays to warm the planet up, if placed between Earth and the Sun it could block some of those rays, more than compensating for greenhouse gases. Such a minor task to save the coastal cities and beaches.
I think the rocket plume causes the air ahead of the rocket to expand out of the way, it is sort of like a standing explosion. the rocket also slows the rocket relative to the atmosphere so there is less frictional and compressive heating after the rocket burn.
Arguing with you and your politics is a colossal waste of time. You are unable to objectively read. I'm done with this thread.
GW
I read every bit of what you wrote, that is why I broke it down and refuted it in detail. I don't agree with you that the Vietnam War was an unworthy cause, I may question the way it was fought, but the cause of liberty and freedom was unimpeachable, and it is too bad we allowed the North to win, because they certainly didn't deserve to, they were the ones that started that war in the first place, South Vietnam didn't start it, they were quite willing to live in peace with the North as a separate country until they attacked! It was a terrible war, and we didn't start it, so its not our fault. Our fault was sending hundreds of thousands of drafted US soldiers there, and then abandoning them because of changes in the political winds of Washington!
Of course, Tom, you've sited your colony at a very high altitude where you can't use the atmosphere to slow you down in landing, and where there is less atmosphere to shield you from solar radiation and cosmic rays.
There are ways to shield from cosmic rays without atmosphere, and the difference between 0.007 atmosphere and a vaccum is slight, most of the slowing occurs at high altitude anyway, and the atmosphere attenuates with altitude only a third as much as it does on Earth due to the low gravity. There are some good arguments for a base on top of Pavonis Mons, if you wanted to mine Mars and hurl stuff into space with a mass driver to build O'Neill colonies in space for instance.
Tom:
Vietnam was one country (just not a free one) until the mid 1950's when the French left. Then it was partitioned between a communist north and non-communist south.
Much like the United States was during the Civil War.
Under French rule, independence movements were ruthlessly quashed, very similar to what the Brits did in Ireland for about 300 years. Then the Japanese invaded and threw the French out. Japanese domination was far worse. But, unlike some other neighboring lands, the Vietnamese threw the Japanese out without significant help from the allies.
If they had Communism in mind, what good is independence? Lets say you ran a business in South Vietnam, it was very profitable, and some independence movement where Ho Chi Minh gets to take power and run everything, wants to nationalize your business without paying for it, its all your hard work down the drain. Now your business did well under the French, and under the Americans, and suddenly the political winds change in Washington, the the Communist troops are closing in in Saigon, where your business is located, people are fleeing, trying to get into America. The Northern troops come in and nationalize your business, you were counting on that business to support you in your retirement and the Communists stole it! Kind of like that scene in Gone With the Wind when Northern Troops burnt down the plantation house under orders from General Sherman. So you are evicted, and you find yourself on a boat in the Pacific, evicted from your home, your business and your country left with nothing! Would you say if you were in that position that independence has done you a lot of good? I think you might prefer the French or the Americans, or the Republic of South Vietnam over what Ho Chi Minh had in mind for your life saving, all stolen by a bunch of Communist troops that invaded from the North.
For a moment in time, they were independent. Then we helped the French walk back in and re-dominate them. Ho Chi Minh (who became a Soviet-style communist between the world wars) came to the US first to ask that we support their independence, but we chose to side with the French. Then he went to the Russians. All of this is well-documented history that you cannot deny.
Russia started the War on the side of the Germans, when they invaded Poland, the Soviet Union back then was the only Communist nation, and someone who was also a Communist asked for our help? Why would we want to advance the cause of Communism, it is no better than Fascism? the French however were an established Democratic Republic under occupation by the Germans, so we figure if we helped the French regain their freedom, those under the French would also be free. Now the Communists wanted independence for Vietnam, because they would have a country to rule, rather than something that was a part of the French Empire ruled by a democratic government.
After partition, there was a repressive communist government in the north, and an equally repressive de-facto dictatorship in the south (elections notwithstanding) that we supported as opposition to the spread of communism. You can make a pretty good argument that the series of puppet dictators supported by "outside powers" (us and the Russians) was more visible in the south. You cannot argue with the fact that these puppets in the south were corrupt and despicable people, because they were. This, too, is documented history that you simply cannot argue with.
So they weren't perfect, I'd say the Obama Administration and Hillary Clinton were corrupt also, does that justify a totalitarian state taking over and nationalizing private property and businesses, all of which they didn't build? They also got to rename the City Saigon to Ho Chi Minh City, that egomaniac didn't build that city, Saigon was its traditional name, why did he get to rename it? Does that sound fair to you? Communism is itself corrupt. If corrupt officials abused their power in South Vietnam, Communism introduced systematic corruption in the government structure itself, no fair elections, a political monopoly for one party, the Vietnamese population doesn't get a say in who rules them! I would say the two are not equal, and South Vietnam was a more fair and just political system that what the Communist North offered.
Evil dictators like that always spur violent opposition. That was the Viet Cong. Their "natural" allies were their communist brethren in the north, nothing surprising about that. Most of the common folk in the north and the south just wanted to reunite their country without any foreign powers controlling it. Folks in that part of the world cared far less than we do whether something was "communist" or not. That, too, is a demonstrated historical fact. You cannot argue with it. You don’t have to like it. It simply “is”.
Why were there so many boat people coming out of occupied South Vietnam then, if they liked the Communists so much? If they liked getting their property appropriated by the Communist Government, and if they liked being threatened with death if they complained about it?
So North Vietnam starts a war with South Vietnam, and we reward them by giving them the land they started the war to get, how does that encourage peace in the future? for North Vietnam is was simply: Start a war, and get what you want, you double the size of your country at your neighbor's expense. What does the South get out of this, an unrepresentative dictator that looks like them, instead of a round-eyes French Administration, that is an ally of the United States and thus subject to its pressure on human rights, North Vietnam is not going to listen to us on that score. I don't see the advantage in being dominated by the Communist North instead of by France or the United States, unless "slanted eyes vs. round eyes" is the most important thing for you.
In the mid 1960's, when LBJ vastly escalated our war effort there, we essentially dominated the south and everything in it militarily, also documented historical fact.
And the Communist North did not? Did we appropriate as much private Property in South Vietnam as did the government of North Vietnam? How many people were left poor and destitute because of us as compared to what the Communists did?
From the point of view of the civil population in the south (quite different from ours), the US was a foreign occupying power, no different from the French or the Japanese.
And North Vietnam was not? The Japanese at least looked more like them, they shouldn't mind the Japanese occupation as much by that logic. The Japanese were brutal, but then so where the North Vietnamese, both had slanted eyes, both were Asians.
The Russian presence in the north was far less dominating.
Well they had "round eyes" too, looking much like Americans as far as they were concerned, why should they like their "round eyes" better than our "round eyes?"
So, it was no surprise that our troops could not tell friend from foe. Basically, most of the local folk all wanted us gone. That's why that war so difficult, and why conventional battle approaches seemed so ineffective, in spite of our overwhelming military superiority. Good leadership, bad, made no difference.
Then why did so many Vietnamese come to America after the War, if they wanted us gone?
Once you understand that, then you can understand why we lost. It didn't really matter who said what or who voted which way in DC, how do you win a thing like that, when the entire civil population is fundamentally your foe? They're your foe, because what they want and what you want, are fundamentally incompatible. You cannot win, you can only exterminate them. Which got done on a small scale in some places like My Lai, unfortunately. Extermination is against all American values. But it did happen. And it made things even worse.
Extermination is not against Communist values if you look at Cambodia, So you are saying they wanted us gone because they didn't like the way we look? There is another word for that and it begins with the letter 'R'
.
Assigning blame to the Democrats for losing the war is somewhere between pointless and wrong, and has almost nothing to do with what actually happened. You really need to take off your political glasses when you read history. It leads you to incorrect assessments. Have you not noticed how many correspondents (not just me) on these forums take you to task for it? There's a pattern there.
When you get your country into a war, and you draft young men, who had other careers in mind, into that war to fight for your country, or so you tell them, you have a responsibility to win the war for their sake and for the sake of the sacrifices you are asking them to make. You should go down to the Vietnam War memorial in Washington DC and look at those 58,000 names there. Those names are the names of the victims of Democratic Party politics where they decided to go to war to whip up patriotic fervor, and then the political winds shifted and they decided to go against the war, and thus undermine the cause we send those young people out to fight for in the first place, and they said to those widows, and parents, and children who lost loved ones in the Vietnam War that they were a bunch of suckers to listening to the Democrats in the first place, tough luck about losing a family member to shifting political winds, had we not gone in their in the first place, many of those people would still be alive, it was because mostly of Kennedy and Johnson that they are not, and what did they make that sacrifice for? Because of the Democrats shifting political calculations, they made that sacrifice for nothing!
Vietnam has been unified and independent for about 4 decades now. From what I read and see on TV, while still communist in name, and still an authoritarian state, they converted to a capitalist market economy long ago.
Just as corrupt as you say the South Vietnamese government was, but at least back then they had elections that meant something. The North Koreans weren't so lucky. Its not Capitalism that matters so much as Democracy, Capitalism is nice, but without Democracy, property rights aren't safe, they are subject to the whims of a dictator, and could be taken away just as fast, and there are no elections that can stop them. Independence, and by the way, South Vietnam lost its independence, is meaningless unless it comes with freedom, otherwise it is just an employment opportunity for a dictator.
As far as I can tell, the only such communist state that hasn't yet gone capitalist is Cuba, and their days as a non-capitalist economy are numbered, now that the cold war embargo is ending.
And I ask you what good has Cuban Independence done the Cubans, are they happier there now? Why are so many Cubans fleeing their homeland? Cuban independence was a failure if it resulted in Communism, they would have been better off as a US Territory or State. As part of the United States, they would not have been under Fidel Castro, the only thing you could say in his favor is he spoke Spanish!
It has taken decades on both sides to emotionally recover, but I notice in recent years that there have been reunions of vets from both sides in Vietnam. I'm just glad it's long over. We could use more friends in the region to hold back the ambitions of the Chinese.
GW
In the American Civil War, when the South Lost, there was Freedom, can you say the same thing about when the South lost in Vietnam? The North in that country freed no slaves.
If it is supposed to land vertically, why does it have delta wings?
SpaceNut wrote:Equator landings are idea for solar but is there the water reserve under ground in ice along the deeper places in the mars landscape....if so then its a yes....
There is. Check out Nasa's InSight mission
I quote ___Rocket___ from r/spacex subreddit:
the current landing site of InSight is in the equatorial region, in Elysium Planitia. What's the most interesting about this area is that it contains the probably biggest known deposit of water ice in the equatorial region. Most of the water ice is in the polar regions.
....
The position of the water ice is 5°N, 150°E - while the InSight landing site is currently at 4°N, 136°E, pretty close.
The volume of water ice is huge: 800x900x0.045 km - a shallow, flat, high concentration deposit of ice ideally suited for in-situ methane and LOX production, possibly just a meter or two below the surface ash/sand.
Mars One is dead in the water. Forget them.

The blue circle on this map is where I proposed to site the colony, the red circle is the location you proposed. Your site may have more water, but my site, I think has some more interesting geological features to investigate, and part of the way this colony will pay its bills is through exploration. The Valles Marineris is the biggest canyon system in the Solar System, and to the West are a cluster of shield volcanos, one of which is Olympus Mons, the biggest such mountain in the Solar System, a couple of future tourist attractions I think, and this site is about equidistant from both, and there is Pavonis Mons, located right on the equator to the west.
Watch two new mini-rockets launch and hover in the air
They're the latest prototypes from Masten Space Systems
By Loren Grush
on June 7, 2016 04:38 pm
@lorengrush
http://www.theverge.com/2016/6/7/118779 … yptr=yahoo
Aerospace startup Masten Space Systems just introduced two new additions to the company's long line of reusable rockets and landers. The vehicles are called Xaero-B and Xodiac, continuing the company's tradition of assigning X-names to its products. A new video of the rockets shows how the two prototypes can launch from the ground and then hover in place — a feat known as "station keeping." The craft can also lower down and gently land upright on the ground to be used for future flights; it's similar to how SpaceX and Blue Origin's vehicles land, but on a much, much smaller scale.
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The vehicles can land vertically on very precise targets
Based out of Mojave, California, Masten Space Systems has made a name for itself making small rocket-powered landers that can take off and land vertically. The vehicles are also known for landing on very precise targets. Because of this, one of Masten's landers won a $1 million NASA-sponsored competition in 2009 for its potential as a lunar lander. None of the company's rockets have gone to space just yet, but Masten was just recently given $3 million by DARPA to develop a reusable spaceplane that can launch satellites into orbit.
In the meantime, Masten will continue to test out rocket-powered take-offs and landings with the Xaero-B and Xodiac. The company claims the Xaero-B can fly up to altitudes around 3.7 miles high. Masten will offer up the two prototypes to companies looking to test out potential space technologies on rocket-powered vehicles. These types of landers offer up a unique testing environment for companies, since they can descend very rapidly from high altitudes, unlike helicopters.
I was thinking of the Movie Everest, in that movie they had to rescue an injured climber who made his way down from the Mountain to Base Camp, and helicopter flew up and could barely attain that altitude because of the thin air, but a rocket, such as the one shown in the video easily could. I wonder if Mastern Space System could sell a rescue rocket similar to the ones shown to help injured climbers get down from Mount Everest, where helicopters can't reach?
Tom:
Your rantings have become insanely bizarre, or maybe bizarrely insane.
As a matter of fact, in 1969 I left college and joined the Navy, intending to become a fighter pilot, and go to Vietnam.
Don't you EVER question my patriotism again!
GW
Well North Vietnam started the Vietnam War by attacking the South. Before there were two separate countries North Vietnam and South Vietnam, and the North attacked the South, started this war where 58,000 of our servicemen and women got killed, and then took South Vietnam for all the damage and destruction they wrought, does that seem just, right and fair to you? We let them win because of action taken by Congress, and because of that millions of Vietnam Citizens in South Vietnam lost their freedom and representative Government. Now the regime of North Vietnam may be Soft Communism rather than the Hard Communism of North Korea, but it still isn't a representative democracy, the South Vietnamese citizens don't enjoy the constitutional protections they did when South Vietnam was a free and independent state. Why do you think there are so many South Vietnamese refugees still living in the United States? Now I'm not questioning your patriotism, I'm just appealing to your reason. Maybe someday, the South in Vietnam will rise again! What do you think about that? If the Northerners like their Communism, they can keep it!
The diagram doesn't mention this, and a bow shock would have appeared whether the engine was firing or not, it appears around any object that is entering the atmosphere. Perhaps you are right about the rocket exhaust though, its just that its not mentioned as what the rocket is doing. Though why else would you have a reentry burn? The Apollo capsule did not, it just hit the atmosphere with its ablative shields faced forward. Perhaps the rocket exhaust acts as an ablative shield, but this time ablating gas. The engine nozzle is designed to deal with high temperatures.
A colony can do a lot of exploring. Exactly what is it you need to know about where to plant the colony?
Where would you put it? I'd put it at 100˚ west and 0˚ North. (on the equator) See the map? This is right between two major land features. Pavonis Mons and Valles Marineris.