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KSP2 Release Notes
Posts posted by DDE
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2 hours ago, The Raging Sandwich said:
It landed right in the middle of a snowstorm in a frozen sea. Vehicles could not reach it, so swimmers had to attach a cable to the vehicles and drag it out of the lake.
Nitpick incoming!
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10 hours ago, Ultimate Steve said:
...And don't forget, the first ever mention of a countdown! And the fact that the filmmakers hired rocket scientists - including Wernher Von Braun - to help make the film more realistic. If only Hollywood did this today.
They do. It's interesting to see how what's left of a reality-compliant plot show up between the lines in Armageddon.
Also, Tsiolkovsky and the Soviets were right on it... if you're into calling you spaceship Joseph Stalin, launching it from rails, and using liquid chambers to survive g-forces.
https://en.wikipedia.org/wiki/Kosmicheskiy_reys
It's still better than the Russian spin on Avengers.
Spoiler -
Alright, guys, I did my own digging on Reddit (world-class sleuthing work, I know, no need to thank me) and the project is a bit sinister. Their website contains some interesting lines:
Quoteeconomic and political considerations often take precedence over purely scientific ones and ethical boundaries are considered necessary to sustain safety.
Now, the project is chaired by the previous head of Almaz-Antei, Russia's surface-to-air missile manufacturer, who was known to proclaim the following:
QuoteWe stand idle, bound by international treaties about a ‘peaceful space’ which no one observes, except for us. The militarization of space is inevitable. What’s more, it is vitally needed.
And Asgardia's primary objective is some kind of an asteroid defense system.
Musk isn't the only supervillain in town, it seems!
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42 minutes ago, Angel-125 said:
Does 1.1.1 work for you?
Nope, issue persists. It's just got an added blue ridge around it, which is also transparent from the other side.
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7 minutes ago, Angel-125 said:
You still won't be able to put the Doc in a KIS container though.
My Doc hasn't gotten the memo, I've taken it to the Mun in a KIS container already. The trick is to affix a Doc to your ship first, and then drag THAT into the container.
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@Angel-125, OK, so I've pasted all the assets from the latest version. And now the section above the upmost seams of the Doc is see-through; not just the textures, seems like a part of the model is missing.
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45 minutes ago, Angel-125 said:
The collider issue with the Doc was fixed in the 1.2 version of Pathfinder. You can pull the .mu files from Pathfinder 1.2 and stick them in your 1.1.3 game.
My guess exactly. Issue resolved; I've learnt to deal with the KAS problem.
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@Angel-125, reporting another damned peculiar glitch; using the old 1.1.3-compatible version. Can't pull a Doc into a KAS container from the VAB's selection of parts, but could do so if I was pulling from a Doc already attached to the ship.
Also, re: complaints about solar array and telegraph size, looks OK on my end, the solar array is huge; should check if override for KAS volume calculation is working, just in case - was a problem with RoverDude's inflatables - but looks like it does.
Further to the above, Doc appears to be missing a collider and is intangible when inflated. (Edit 2: issues may be intermittent)
Also, is there any way to remove the requirement for TERRAIN before taking core samples?
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Hey @Angel-125, I see you've dramatically cut down on the number of KAS pipe ports per part. Any tip on how to link all those fancy Gaslights of yours to the main base?
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Chapter 24: Heat and Kitchens
Sidhat glanced once again at the gloveboxes housing his still-ongoing crystal growth experiments. He’d spent a bit too much time on microgravity combustion, so the next crew will have to keep their filthy hands out of the experiment chambers, and just take some photographs from the outside.
It was easier for Stelemma, who merely had three miles of film to pack up after testing Vulkan’s future porthole-mounted camera.
The Hermes undocked on schedule and initiated descent.
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Meanwhile, Val hit a snag.
She had agreed to handle the launch of the third and final docking-capable Intern ship. It was lighter than the Vector she tested on, so it should have been usable off-the-shelf. However, the Vector was designed to be pretty slick, and the Intern... wasn’t.
And no, the Super Darter’s cargo bay could not fit a fairing.
At the very least, they had to plaster it in a whole lot of ablative coating, and go for bigger grid fins. And that still probably wouldn’t be enough.
Which meant they still launched right away.
Val watched the drone climb and accelerate until the jet cut-out point.
“Bay doors open. Payload sep! Engine firing!”
The first failure scenario was not realized; the upper stage did not destabilize and flip. It began ploughing through the upper atmosphere.
And it kept ploughing on. Numbers kept creeping over the consoles, and they weren’t good.
“Temperature alarm, Flight.”
Gene furrowed his eyebrow, and glanced at the launch cyclogram. The ship was blatantly underperforming due to drag.
“Abort,” he said tersely.
He didn’t say anything to Val. But as soon as the return vehicle separated and entered ballistic descent, Mission Control exploded with not entirely friendly observations.
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Gene’s team had no such bizarre variables to overcome with Hermes-Cargo. A slightly cut-down Hermes Mk 2 launch system, topped by a modified, shrouded ship. Just like the failed Intern, it was a part of the plan to stock up Piraeus ahead of Expedition 3.
The cargo variant was a mismatch of parts from several different Hermes models, with EX’s solar panels and half of the monopropellant-radiator array along with Mk 1’s propulsion section, topped by a glorified supply closet.
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“Yeah, the carbon extractor loop is holding up,” Jeb announced into his headset, “We’re losing maybe a few percent of water; I suggest we compensate on the flight by starting with a filled-up greywater tank.
“We’re seeing rising particle counts, though, and it’s coming from Athens. You’ve got to warn Expedition 3 to what they’re likely to run into as well.”
The interior materials weren't exactly holding up during the long mission, apparently. Meanwhile, Bill glanced at the atmosphere sensor dashboard.
The CO2 indicator readout was rising before his very eyes.
Hurriedly, Bill glanced at the internal temperature measurement. Yep, it was climbing as well. Jeb’s eyes fell onto his horrified expression.
Shoving Jeb aside, Bill lined up on the open hatch to Athens, breathed in loudly, and launched himself inside. In seconds, he flew back the way he came from.
“Fire!” he shouted without a tinge of panic.
“Oh, snap!” Bob snarled as Jeb locked and dogged up Vulkan’s internal hatch.
“LOC, priority alert, fire in Athens station, foremost section. Requesting immediate airlock override and flush!” Bill rattled off.
The stench of burnt plastic suddenly became much more detectable against the plethora of other odours permeating the ship.
“We’ve got it under control already!” Jeb barked, “What’s the CO level?”
“Not enough to kill us, apparently,” Bob scoffed.
The hissing of the escaping air was barely audible, and the creaking of the larger pressure vessel was a much better indicator. It would remain a mystery whether the fire starved itself of oxygen itself or was extinguished by the flush.
“We can still salvage the station with a Hermes-Cargo,” Bill suggested.
“No real need; we can complete the mission with what we have on this side,” Bob responded.
“Looked like a regular electrical short. I think we have a new sensor to add to our ships,” Bill resolved.
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Valentina was chairing the meeting of the greater part of the aeronautical division. The backup Intern had already been rolled onto the pad, mounted atop a conventional booster.
Meanwhile the rest of KSC were expressing their Schadenfreude in typical Kerbal fashion, and the walls of the new aircraft hangars were being painted into the vomit-inducing red of rotten tomato innards.
"So?" asked one of the line engineers.
"So!" echoed Terigh.
"So-so," Val mocked tiredly, "We need a new plan."
"Abandon the air launch, stuff a Darter with passenger seats, spin off an airline," that same engineer suggested, immediately attracting several furious glares.
"I'll be sure to take that under advisement," Val deflected.
"If we let ourselves stop now, we're pretty much good for nothing - very few commercial payloads will fit into our margins, let alone our own ones. The problem is with the low altitude of separation. We can treat the issue as a tactical or a strategic one."
"What do you mean by that?" Val asked Terigh, raising her voice to overcome the din of the other engineers rushing for dictionaries and thesauri.
"Well, we can try to dispose with the low launch altogether, and opt for a 'Hyper Darter' of sorts that is at least partially rocket-powered. Or we can force our way through the problem by... adding more boosters."
Val had to wait for the loud booing to die down to continue.
"But we can't, not in the existing architecture."
"Never said we had to fit it inside the cargo bay."
"Ah..."
"We had major problems with external mounting, but we dumped it pretty early on. Our mistake, I guess."
"Start there. An, oh, there happens to be a spaceplane around that I'd love to mate with the Darter for testing purposes," Val quietly mused.
Somewhere under the table, a tape recorder clicked off.
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Kath's station as a Hermes pilot t her seat was on a lower deck and further back, thus the ancillary payload was strapped to the interior in front of her. In this case, the gantry engineers were busy strapping the payload in after the crew was already inside, which was hardly surprising considering its nature.
The four caged Occidental kibbals all kept their beady eyes on the only Kerbal they could see, and whom they rightfully expected to be their next tormentor after Allock personally implanted them with biosensors a few days ago. Expedition 3 was to stretch the limits on endurance as well as the size of organisms Jesla was willing to use in her experiments; they planned to try and set up a whole terrarium in one of the equipment racks.
"Launch in five, four, three..." Bobak Kerman counted off, having been recently promoted.
"Brace, you fools!" Kath shouted to her animal crewmates.
"Two, one..."
The rest of the phrase was drowned out by the blast, and the kibbals splattered all over their transparent plastic cages.
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2 hours ago, p1t1o said:
"On 24 July 1975, NTO poisoning affected the three U.S. astronauts on board the Apollo-Soyuz Test Project during its final descent. This was due to a switch negligently, or accidentally, left in the wrong position, which allowed NTO fumes to vent out of the Apollo spacecraft then back in through the cabin air intake from the outside air after the external vents were opened. One crew member lost consciousness during descent. Upon landing, the crew was hospitalized for 14 days for chemical-induced pneumonia and edema."
And that's without the fuel and oxidizer teams getting set on fire in case of a handshake.
It's still better than the Inhibited Red Fuming Nitric Acid still used in Kh-22 cruise missiles.
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1.2 is here. HYPE!
Oh...
That's what they meant by 1.2:
Disclaimer: yea, not the 1.2 release, not mine: http://images.akamai.steamusercontent.com/ugc/267225554884229254/34DB9ED64B69DA783292372CC2F492859460A2F2/
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18 hours ago, The Raging Sandwich said:
On October 10, 1983, the Soviet Venera 15 spacecraft completed orbital insertion of Venus.
The antenna looks oddly familiar.
18 hours ago, The Raging Sandwich said:On October 10, 1960, the Soviet space program attempted to launch their first interplanetary mission. It would be a flyby mission to Mars to take pictures of the planet. During the use of the second stage, the payload started to vibrate and pitch out of control. It reentered over East Siberia.
Ah, Marsnik-1, or whatever the poor chap's name ended up being.
That reminds me of the first, failed Venera probe; there's a worthy story from February 4: Its fourth stage also failed, and Venera-1 had to be jury-rigged with a random airtight can. It also reentered somewhere over Siberia. But the landing payload - a bragging rights medal that said "1961 Union of Soviet Socialist Republics" - was returned to Korolev and Chertok in Summer 1963. Korolev got it from head of Academy of Sciences chief Keldysh, Keldysh got it from the KGB, the KGB got it from the local cops, who were contacted by some kid who injured his leg while swimming in a Siberian river.
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16 hours ago, inuzupunupi said:
"media" have never been to Pluto, so Pluto don't real.
I wonder how many people can be convinced of that...
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16 hours ago, The Raging Sandwich said:
Weird, so Titan is actually orange, but Tekto in OPM looks like this photograph... Kraken attack?
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Chapter 23: Affordable, Reliable, Hypersonic
The ground crew hastily retreated from Val’s newest contraption.
The Super Darter turned out quite a bit different from the original. It dropped the crew entirely, with the intake in place of the cockpit for the apparent added insult.
The quad turboramjets compensated for the increased take-off weight, making it only slightly more sluggish than the original. Even with brank new ceramic brakes, it still could not be held in place as the engines roared to life.
The reinforced articulated front canards, combined with the pulsed attitude control jet system and a vanadium steel spring for the front gear, had solved to problem of ungluing the aircraft from the runway.
Val watched it pitch up and blast off like a rocket, the engines only building up more thrust as they pushed onward in the dense air.
At around 15 km she finally shoved the control stick forward. It was time to maximize downrange velocity before payload release.
The airspeed kept climbing rapidly; high and fast was where those engines truly excelled.
The Darter became visible from the ground once again as the plasma sheath formed around it.
And at the predicted 26 km mark, alarms went off and the engines choked up.
“Alright, we’re there,” Terigh noted.
“Start the procedure.”
Up above, the payload bay doors swung open and the separation rockets carried away an old fuel tank filled with concrete blocks.
“Flight computer is entering braking mode,” Terigh reported.
The Darter spent the next few minutes bleeding off speed and descending back into usable atmosphere. Eventually, telemetry reported that the engines came back on, and the autopilot began a turnaround as the plane fell out of the sky.
“Course 1-2-0… 1-5-0…” Terigh read off.
“Whoa, that’s a 15 g turn!” Val exclaimed.
“2-7-0, it’s thrusting up.”
“Down at 10 km?”
“Yep… I’m getting a temperature alarm already.”
“Twelve hundred… fourteen hundred,” Val read before the screen blinked dead.
“Loss of telemetry from Darter,” Terigh drily stated.
Val descended from the flight tower. The alert sirens went off. The half-molten plane had picked up enough raw speed to reach them; it came in screaming like a meteor, and augered in north of the runway.
But Val had learnt from Gene’s Orion program. The second Super Darter stood ready in the hangar, with the cargo bay extension the upcoming full-spectrum test required.
And besides, recovering the air-breathing stage was only a secondary objective.
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“Tower, Darter 2 requesting permission for take-off.”
Val was cooped up in a regular Vector ship, mounted inside the spinal cargo bay of the spaceplane. This at least placed her in position to fly the plane herself if necessary; she had at one point undergone training for flying an aircraft while in a backward-facing seat, and it wasn’t particularly enjoyable.
“Darter 2, clear for launch, course 0-9-0.”
“Tower, engine start.”
She watched the autopilot do the rest, her hands on the two sticks. The plane blasted off after reaching barely 80 m/s.
The revised ascent angle was restricted to 30°, allowing the Darter to tear through the sound barrier seconds after launch.
At 10 km, that angle was reduced to 17°, and the final acceleration began, with a sustained acceleration of 4 g.
Slowly the acceleration began to die off as the engines ran out of air. Eventually, the thrust died.
A klaxon sounded as the payload bay doors swung open.
And then the “waist rockets” fired, pulling the Vector and its stretched upper stage clear of the Darter.
The grid fin stabilizers snapped open and the Terrier sparked to life, ready to shoulder its half of the Δv budget.
The Darter remained on its ballistic trajectory, shutting the payload doors and deploying the drag fins.
Its attitude jets then forced it into a nose-up attitude to bleed off even more speed. At 30 km it let go and prepared for engine refire.
The excessive thrust was resolved by keeping the two inboard engines off for the rest of the flight.
The Darter came back to the runway, fins extended, eleven minutes after launch.
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A klaxon sounded as the payload bay doors swung open, and then the “waist rockets” fired, pulling the Vector and its stretched upper stage clear of the Darter. The grid fin stabilizers snapped open and the Terrier sparked to life, ready to shoulder its half of the Δv budget.
Val felt the craft jerk upward, and then heard the whine of Terrier’s turbopump. The upper stage began to push the ship up and ahead. The launch resulted in a long coast through the upper atmosphere, but it spared the clusters of SRBs.
After circularization, Val had the docking system lock onto the TARDIS. The old rendezvous training target was about to be used one more time.
The docking itself was a boring process; despite all that time, the instrumentation bus on top of the rocket was still fully functional and guided the Vector in.
But instead of undocking, Val reoriented the stack and fired her ship’s engine. TARDIS was due for retirement, and she was to drag it out of orbit.
SpoilerNow here’s something that isn’t going into the story: Val cooked up on re-entry. It’s an old bug I encountered back in 1.0.5: at some point, weeks or months into a modded install/save, the 1.25 m heat shield stops protecting the Mk1 pod, so it burns up at around the 45 km mark; other combinations remain unaffected. I’ve been unable to deal with it by conventional methods, although I seem to have found a guy suffering from the same issue; my only option is to retire the part, and I consider myself lucky that I had no more plans for it anyway.
This is hardly the first bug I’m dealing with over the course of this series, but it’s for sure the most frustrating.
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Yet another modded install guy with the same issue. It's a bit difficult to pin down because half the people don't expect them to track the sun/
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Well, I managed to uncover the old 1.0.5 bug that, after some time of playing a save, causes Mk1 pod to suck up the heat from a heatshield connected to it. And it only affects the Mk1 pod.
This really rained on my parade.
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It's back, yep. A Mk 1 pod heats as badly as the heatshield, and proceeds to explode. As before, it fails to affect other 1.25 m assemblies and other heat shield sizes.
Partial mod list:
Spoiler- 6 Seat Mk3 Cockpit
- Astroniki Sunflare
- B9 Part Switch
- BahamutoD Animation Modules (cropped)
- BZ-1 Radial Attachment Port
- Chatterer
- Community Resource Pack and Community Terrain Texture Pack
- Control Lock
- Cryogenic Engines, Cryogenic Tanks, Heat Control, KerbalAtomics, Near Future Construction (cropped), Electrical (cropped), Solar (cropped), Spacecraft by Nertea
- Deployable Engines Plugin
- DMagic Orbital Science
- Docking Port Alignment Indicator
- Docking Port Sound FX, RCS Sounds, Rover Wheel Sounds
- Engine Lighting
- Final Frontier with Engineering, Operations, Science roles packs
- Firespitter (core)
- Kerbal Alarm Clock by TriggerAu
- Kerbal Attachment System and Kerbal Inventory System
- Kerbal Joint Reinforcement
- Kopernicus and Outer Planets Mod with Sigma Binary
- Magic Smoke Industries Infernal Robotics
- MechJeb 2 (minus the parts, added to pods as standard)
- Mk 1 Cockpit RPM Internals
- Module Manage (duh!)
- NavBallsToYou
- RasterPropMonitor
- Real Plume
- RealChute Parachute Systems
- Planetshine
- RemoteTech (with extremely custom configs, available on request)
- SCANsat
- scatterer
- Shuttle Lifting Body
- Smart Parts (cropped)
- SmokeScreen
- StageRecovery
- Stock Bug Fix Modules & StockPlus
- Stock Visual Enhancements (ultra)
- Surface-Mounted Stock-Alike Lights
- TAC Fuel Balancer
- TACL Life Support (cropped, with two visual upgrade packs)
- Texture Replacer
- Throttle Controlled Avionics
- Toolbar
- Trajectories
- TweakScale (severely cropped)
- Universal Storage
- USI Survival Pack (with custom config)
- USI Tools
- Ven's Stock Overhaul (cropped and altered)
- Stockalike Station Expansion
Edit: overwritten stock files with a clean install; no effect.
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Chapter 22: But Radiation Should Scramble the Photographic Film!
Eil and Ros spent the next day cooped up in the lander, while the team “back down” was busy putting Hornet 2 into a parking orbit.
Finally, a week into their stay, Roszie descended down the ladder one more time, and kicked the power lines free of the lander.
The Poodle refired, and the acceleration crushed the away team into their seats once again.
Jenrick didn’t move an eyebrow as Eilphie floated into his ship and shut the hatch behind her. He maintained a demonstratively stoic and annoyed look. Back in the lander, Roszie flushed the atmosphere out and stepped overboard one more time. Instead of floating free, she forced the ladder to redeploy, and descended down, facing the engine bell.
The two targets of her interest were there, at 1:30 and 7:30. The RTGs were mounted onto quick-release bayonet lock systems, and it too only a minute to dismount them.
Jenrick still remained stone-faced as she entered the Hermes and clamped the blutonium cans to the hull racks.
“Missed me that much, huh?” she finally said.
Jenrick cracked up for a few seconds.
“Dumping the Hornet,” he said, trying to force the wide grin off his face.
“Amber Actual, engage engines one through three, stand by for trans-Kerbin injection.”
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“Gantry-Four-One to Pad Leader, peas are in the can, clearing level twelve, over,” one of the hardhats yelled into his radio, before turning to Yaroslav Kermanov, “Gotta go, sir, five minutes until launch, we’re about to retract the crew gantry.”
ISP had several Hermes flight crews. Gold was Jeb & Co., cooped up in Athens-Vulkan; Munar missions were by now way below their station. Amber were being trained up to the same standard of versatility, slated for an Eve flyby. Alpha and Bravo were from the start assembled as station rotation crews; Silver was bogged down by his and Valentina’s terrestrial engagements. That left X-ray and Zulu, two rookie teams. Zulu required the addition of a flown engineer to keep them… stable; X-ray were bright, and Kirsen Kerman was Yaroslav’s very own personal choice for the upcoming mission – the next best thing to going up himself.
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“Commencing injection burn. Thrust to full,” Newgun Kerman announced quite needlessly, as it was impossible to miss the Poodle firing.
“Pump pressure nominal,” echoed Billy-Bobler.
Kirsen Kerman just clenched up in her seat.
“Insertion confirmed. Computing intercept solution.”
“Docking vector acquisition complete. Engaging autopilot.”
Once the ship docked with the lander stack, Kirsen and Billy-Bobler split off to get on with the actual mission.
As to the new landing zone, it was on the farside, and it was a real treat. Hornet 1 had been just a dress rehearsal of actual work.
“Contact lights. Engine cut-out!”
“Green across the board.”
“Hornet 2, you have a Stay.”
“Suits on!”
Hornet 1’s LZ had had an acceptable margin of around 12 km; the current LZ was nudged in between a sizeable impact basin, and a canyon two dozen kilometres long. Needless to say, the surroundings were considerably more scenic.
Billy-Bobler meanwhile got busy with a wrench.
As with Hornet 1, the mission began with an overnight stay.
And in the morning, they broke out the rover. It was going to be a fun day.
The rover was well-fitted for the terrain, with sharp inclines of crater walls, and plenty of ejecta boulders to dodge around. 18 km one-way total, and a good kilometre upwards too.
Eventually the canyon walls came into view. The bottom was nowhere near flat, and Billy had to drive carefully through the narrows until finally dismounting in what was the lowest-lying part of the gully.
Kirsen’s head slowly scanned horizontally, constantly running the risk of breaking the limits of the neck joint.
“Billions of years right in front of us…”
“Yeah.”
“This looks like a rift valley, which means we’ve got quite old igneous build-up under our feet as well as plenty of exposed samples in the wall.”
“Uhm-hm.”
“I’m going to fill the sample bags to the top!”
“You’ve got two hours,” Bobler finally responded coherently.
“…I’d give anything for my Walkkerb right now.”
“Trust me, I’m an engineer! I think we'll put this thing right here. Trust me, I’m an engineer! What the krak did just happened here? Trust me, I'm an engineer! With epic skill and epic gear! Trust me, I’m an engineer! Oh dear, I think I’m outta here!”
“What?” Kirsen gasped.
“I built a lot of bridges; some of them even dance. My buildings are VERY secure – intruders have no chance!” Billy continued singing in a nasal voice, “You want to drive a broken car? I can help you in this! No wheel, no tire? No problem! Those parts I never miss…”
“For the love of all holy, STOP!”
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Mission Control revised the return route after one too many crater wall scares.
Which in retrospect was a bad idea, because Billy-Bobler got the chance to break Roszie’s speed record.
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The magnetic guidance system hummed loudly as ISP’s fancy new 15 m synchrotron produced x-rays for the spectrographer. The trio of planetologists watched the printers spit out the results.
“Basalt… basalt…” Eilphie translated.
“Weird one in sample 174, though …whoa,” Slava noted.
“Oh dear,” Kirsen exhaled, “Look at the signal from hydrogen-oxygen groups.”
“There’s a lot of trapped water in there. And not just the poles. And here I was, thinking Minmus was weird enough for a PhD.”
SpoilerWhy am I going through those motions? Well, the CRP has given me this doozy:
Yes, up to 6% water on the Midlands. If our Moon was like this, I would have an apartment on Mars.
Also, @insert_name, I’m sticking to SVT because KASE is even weirder! Plenty of artistic license taken.
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Hey, @Galileo, was it you who made the terrain scatters on the Mun tangible? I'd be asking for your contact details if I had rover insurance... but damn, that drive was fun.
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@insert_name Assuming that its new grey version of the Mun isn't weirder... But it has textures for Duna and beyond! Does it have the redux for Minmus, I'm not seeing any screenshots and SVT does it really well.
I'm also currently investigating what has caused terrain scatters to become tangible to rovers.
Aaaanyway, you're about to see SVT's version of the Canyon biome. 18 km to go. I do think it looks nice.
Titan Sample Return Concept
in Science & Spaceflight
Posted
At such an investment, I'm beginning to seriously wonder why the transfer tug isn't nuclear-electric. Thus it can slowly decelerate into Titan orbit in advance of the lander's arrival.
Also, given the plethora of methane to go around, I wonder if it would be possible to create an airbreathing rocket with just the oxidizer onboard.