Chapter 2 – The Big Deal
The Hitchhiker’s Guide to the Galaxy is a wholly remarkable book.
“Space,” it says, “is big. Really big. You just won’t believe how vastly, hugely
mind-bogglingly big it is. I mean, you may think it’s a long way down the road
to the chemist, but that’s just peanuts to space. Listen…” and so on.
~Douglas Adams, Hitchhiker’s Guide to the Galaxy
The first book I ever published was about a journey to edge of the universe. It was called “Journey to the Edge of the Universe”. I published it myself even though it was hard lettering a whole book by hand. The pictures were pretty good and Mrs. Barker gave me an “A”. I was the main character and I ingeniously overcame every obstacle. I didn’t have to figure out the relationship dynamics of the crew because I went by myself. Acquiring fuel wasn’t a problem because I used fuel that was completely recyclable. Growing and storing food was irrelevant because I didn’t specifically write anything about eating. I didn’t need to worry about the time requirements for the trip because I hadn’t gotten to that part of math yet. And lastly, I didn’t have to come up with a goal for the mission because when I got to the Edge of the Universe I became a Disembodied Mind (the way this happened was too technical to explain to people who weren’t space explorers so I didn’t bother). I think NASA is incorporating some of my ideas into their programs.
The reality is I had no clue, and the knowledge I have now gives me a clue so small that it can only be called a clue in comparison to my previously possessed no-clue. Sometimes it feels good to be ignorant. It’s easier, because you aren’t aware of potential flaws in your beliefs. You aren’t aware of how relatively small you are, and feeling small is hard to distinguish from feeling unimportant. That may be why it was so difficult in the 17th century for government and church to accept the Copernican astronomical model, which placed the earth in orbit around the sun. Surely God made the universe at human scale, right? We were meant to subdue it. It says so in Genesis. If the earth isn’t the center of the universe and if the universe is much larger than we thought, maybe we ourselves are less central than we thought. Hard truths for people used to feeling significant. In 1632 Galileo Galilei was arrested for telling those truths. I know if you’d pointed out the distance and time underestimations of my plotline back in third grade I’d have felt pretty stupid, and then I’d have tried to argue with you. “Nuh-uh.” “Yeah-huh.” To this day I’d like the stars to circle around me in their crystal spheres. I’d like to scoop some up in a satchel and bring them back for show-and-tell.
What would it take to go on that trip for real? Well, you can’t. It’s too far and you would die. Depending on how you identify and measure distance in space-time, the edge of the visible universe is as little as 3 billion light years away (Angular Diameter Distance, which measures how far away the furthest visible galaxies were when they emitted the light we see) and as much as 47 billion light years away (Comoving Distance, which tells you how far the furthest visible galaxies are right now if you had a measuring tape hooked on their outer edge). Don’t get me started on Luminosity Distance and Light Travel Time Distance. If space-time stopped expanding the day you left and if you could somehow move at the speed of light it would take 47 billion years to reach the edge of the universe – if the universe actually has an edge, which it probably doesn’t. Got that?
I know. It hurts. Think God’s out there? Let’s go.
Journey to the Edge of the Universe (Revised)
Almost there. Forty seven billion years ago the governments of Earth pooled their money. Propulsion engineers worked out light-speed travel. Astronomers picked out the furthest visible object, took aim and sent us off on a mission they would never hear back about1. I say they sent “us” off, though I really mean they sent our ancestors, four billion generations past. Instruments say we have now travelled 276,289,491,070,000,000,000,000 miles. Just 16,094,799,100 miles to go. At light speed we can reach the edge of the universe by this time tomorrow. Bring your camera.
You and I were born after the last stop on solid ground. We don’t know life off of this ship first-hand, just what we learned in school from the old books. The air everywhere smells of machinery lubricant and compost, filtered by atmospheric processors and the vegetation in the greenhouses. We don’t notice; we breathe in and out and it is as it always has been. The hum of the engines never stops except in our sound-proof sleeping modules. It is the white noise of mission. While air quality and background buzz remain constant in our artificial biosphere, the temperature fluctuates. Men turn the thermostat down to 64 and women turn it back up to 74. Even after 47 billion years of isolated human evolution there are some things which remain inherent in the species.
The crew consists of [note: Look up number of people necessary to avoid genetic bottlenecks in a human population while also accounting for losses to disease, rebellion and conflict in a closed environment]. Each person on board was trained from childhood to perform a necessary function in the community. We have been powering our ship with [note: Identify fuel which is abundant enough along the flight path to guarantee successful periodic refueling during the journey. note 2: Fuel must be easily extractable. note 3: Gaps between galaxies will regularly be 2,000,000 light years – stock up when you can.] The food stores look good. We have been thriving on a diet of [note: Determine which foods can provide all essential nutrition and can be grown in interstellar space while also accounting for losses to disease and competition in a closed environment. Maybe quinoa and blueberries.]2
The sun Sol is long gone. About five billion years after we left, it became a red giant and incinerated the Earth. Then it collapsed into a white dwarf and is still slowly cooling. For a while back then “Sol” was a popular name for kids born on the ship, but we got over it. While the Earth was dying out on the Orion-Cygnus Arm of our native galaxy, the Milky Way collided with the Andromeda Galaxy and merged with it. Maybe mankind survived even that and everyone moved on to other home worlds, but we can’t know. Moving at light speed means communication travels the same speed we do. If a message was sent after the collision telling us we aren’t the only humans left, it may be billions of years before we hear it. In the meantime, we can use our own telescopes and look behind us to see (more and more faintly) a long-extinct version of the Milky Way. Ironically, the distant galaxies our ancestors took aim at were non-existent by the time they could be seen from Earth. They were already burned out, fused and dispersed. That means points A and B for this venture - both origin and destination – cannot and could not be seen as they really are, only as they were.
And there was evening and there was morning, the last day. It’s time.
The ship draws to a halt. The entire population of our ship/colony/biosphere gathers at the windows and looks out. We see stars and galaxies in every direction, moving away from us at speeds proportional to their distance, just like we saw from Earth, or so the old books tell us. It is magnificent. Aside from the invention of Tabasco it’s the greatest human accomplishment ever, but reaching this point in space is an ironic anticlimax. We have known for a long time what we would see when we got here; after all, we had windows and telescopes yesterday, a million years ago and forty seven billion years ago, so we could look ahead to where we were going. As we moved, the horizon moved. We are not at a magical margin in space; there is no barrier to push through. From what we can tell, the universe doesn’t have an edge. We take a vote and it’s unanimous. Everyone says it’s time to quit flying around and find a nice, habitable planet where we can settle down, plant trees to hang hammocks on and watch these “sunsets” we’ve read so much about.
I hope there are theologians on this ship, because I have some questions. Why should the universe appear to end when it doesn’t? Why would God restrict what we can see? And do I understand the creator more or less when parts of creation are shut off from observation?
Know What? No, What?
We have a long history of thinking the horizon was the edge of the world. Yet, every
horizon we’ve ever reached - physically or intellectually – only revealed another
horizon in the distance. Just because we can’t see over the mountain
doesn’t mean there’s nothing there.
~philhellenes, “This Remarkable Thing”, YouTube
There are things that can be known, things that can’t be known right now and things that presumably can’t be known at all, at least by us. That’s incredibly frustrating. God made my brain – and your brain – curious. Having a curb on how much I can satisfy that curiosity just kills me. The universe provides us an objective tool (the speed of light in a vacuum) with which it can be measured. It also resists measurement by expanding too quickly for that tool to be useful over distances greater than 47 billion light years. The universe may be a specific size, but we lack the means to know. Basically, we’re too slow. By seeking God in nature we are assuming that God makes himself available for inspection through nature. The obvious implication of a really big universe like the one we just flew across is that God is even bigger.
God’s big. That’s it?
Actually that’s not it, which is too bad because “God’s big” is at least simple. We can use lasers to see how far the moon is from Earth. It’s far. We can use the red-shift of light arriving from stars to see how quickly they are receding from Earth. Some are near light speed. But the speed of light breaks down as a tool when objects are moving away from us more quickly than that. This determines how far we can see into space from our current position - the “edge” of the universe. If Pluto suddenly exploded, we would see the flash after about five-and-a-half hours. That’s fast, but not infinitely fast. Because light is limited, we are limited. I think God uses that. My guess is that any God worth bothering with would not be restricted by anything; God would be the source of limits. The real takeaway about God isn’t his size per se, but that there is more to God than we can see from any one vantage point. God may not change, but what we can know of him depends on where we are. When we move, the horizon moves.
Pushing Limits
And the end of all our exploring will be to arrive where we started
and know the place for the first time.
~ Dogen
The ideas that got Galileo in so much trouble in the 17th century were objectionable because they contradicted what authorities thought must be true – that the sun, moon, stars and planets crossed the sky while embedded in solid, crystalline “celestial spheres”. Pythagoras proposed this concept of concentric heavenly spheres moving in harmony about the same time the prophet Zechariah was writing his part of the Hebrew Bible. Pythagoras was spectacularly wrong about the spheres of course, though he was quite good with triangles. These days we think of celestial spheres as beautiful metaphors and we sing about Pythagoras in church - This is my Father's world, and to my listening ears all nature sings and round me rings the music of the spheres.
Spheres pop up as metaphors in old hymns and poems, serving as poetic boundaries where God crosses into human experience; spheres and domes are still used as fun literary devices, showing how people react when their perspective is contained. You see them in Twilight Zone episodes, Stephen King’s novel Under the Dome, and in films like Logan’s Run, Bio-Dome and The Simpsons Movie. The year my first son was born, Jim Carrey put out a movie called the Truman Show. Jim is Truman, a baby adopted by a media conglomerate and plunked into a giant dome with fake family, fake sky and fake weather so the company can film it all and show it on television. The only real things in the movie are Truman and how he reacts to his experiences. The trick is keeping Truman just content enough and just scared enough that he won’t try to reach the edge of the dome. In the end it doesn’t work. He sails a boat to the edge of the dome and sticks the prow right through it. Truman locates a door, and although the producer uses Voice of God speakers to convince him to stay inside, Truman – True Man, get it? - walks through the door into the real world. Everybody watching at home cheers and cries.
Humans have collectively lived in a series of Truman domes – knowledge boundaries that hem us in every direction. First there were mountains and rivers we couldn’t cross, so the universe consisted of only the habitable land patch we were on plus scary rumors about what might be on the other side. We mastered mountains and rivers, and there were oceans we couldn’t cross. The universe was only our land mass and out there be dragons. We realized the Earth was round and we crossed the oceans, so the universe was Earth with the stars, sun and other planets circling it suspended in what the King James Bible calls the “firmament”. Then the Earth was a relatively small planet going round the sun. Then the solar system was part of the Milky Way. Then many of the stars we thought we could see were actually entire galaxies, and then they were moving away from us at incredible speeds, going literally only God-knows-where. The barriers to knowledge were sometimes physical and sometimes a result of not knowing how to interpret what we were seeing, but each time we were fooled by the painted edge of an imaginary limit. There isn’t any God-like producer tricking us, though. The reality of God’s creation is always there. We trick ourselves. Thankfully, just like Truman, we always seem to break through the façade.
Give people smarter than me enough time and technology and we may someday travel to the furthest reaches of the visible universe. In all likelihood what we’ll find is continuing space in perpetual expansion. But what if we didn’t? What if when we got there the universe ended like the painted sky in the movie? If we were able to see and measure the ends of the universe, what would that tell us about God? An endless universe teaches us there are always new things to know about the nature of God and that our physical perspective determines what we can know of him. A measurable universe might imply the opposite – God goes this far and no further. Sure, God could still be infinite even if space was only yea big, but space without end makes it clear. It is frustrating that we can’t see all of creation, but it’s a fair trade-off. It means we can keep being curious forever. We can change perspectives and push out beyond the imaginary dome.
God in a Little Wooden Box
Although God works at scales beyond our ability to observe, our ability to observe keeps growing. Used to be when we found a new land mass in a daring ocean voyage we would immediately build a better ship for an even more daring voyage. We found most of the land, so we built undersea rovers, rockets for manned moon-shots and probes that have gone beyond Pluto. Telescopes now give us a 47 billion-light-year window to look through. Our view of God gets bigger by the day because our view of creation gets bigger.
On the other hand, sometimes curiosity and history conspire to show us how tiny God is.
When I was very young – way before I went to the Edge of the Universe and became a disembodied mind - I got my first microscope. My parents kept it in the closet in a rectangular wooden case. It smelled like grandma’s old console stereo - dust and shellac. There were slots for the slides and a small packet of cover slips which I continually broke. It had just enough magnifying power to make it the coolest thing ever. I used that microscope to look at all kinds of stuff – often leaves, spit and dirt. I remember being especially keen to examine my own hair. Hair was the smallest thing I could think of and to see it blown up like that was magic. My eyelashes had miraculously grown back after the gum incident, so my mom must have cringed when I pulled them out on purpose. I can’t honestly say I looked at eyelash roots and consciously thought, “God’s in there,” but you already know where I think curiosity comes from. Diminutive pieces of reality make up my body and the entire world; I found them using a round bit of glass in a metal frame.
Summer of 1674, Delft, Holland. You and I are science historians, come to watch a paradigm shift. Creation is about to get much smaller. We walk through Delft’s main business district looking for a particular drapery and linen shop. Textiel van Boven, no. Van Halen Linnen, no. Tekenlinnen. Antonj van Leeuwenhoek – “Cloth/ Anthony of Lion’s Corner”. We’re here. We knock. We go in. There is a man in a robe and cap working at the counter, examining a bolt of fabric with a magnifying glass. He looks up at us and raises the glass in greeting. It’s a simple ground lens common to the trade and Anthony has been using one to check the quality of his linens for twenty years; in our own time the Dutch still sometimes refer to a magnifying glass as a dradenteller – “thread counter”. Anthony has been busy improving the technology and is beyond counting threads. He leaves the counter in the care of his apprentice and waves us up the stairs to his workshop. Oddly, instead of textiles, the room has been filled with glassworker’s tools – glass rods, tongs, spirit lamp and various polishing compounds.
Hundreds of small brass and silver devices are aligned on shelves opposite the window. Each has a metal plate pierced with a small hole and a sharp metal pin mounted on screws. Anthony takes one down and shows us that a fine, minute version of his dradenteller has been fixed into the hole. He fastens a thin slice of cork to the pin, presses the device to his eye and turns toward the spirit lamp. After an adjustment to the screws he hands the device to you. You look through the hole and with the light of the flame you see an orderly arrangement of compartments - plant cell walls. These were first described ten years ago by Robert Hooke in his book Micrographia – a scientific watershed and a work of genius. Hooke’s microscopes magnified cork cells, bee stingers and mineral crystals 30 times. We look at Anthony. “Driehonderd,” he says. Three hundred. Anthony’s microscope is ten times more powerful than Hooke’s and ten times more powerful than anyone else’s. Nice one. Time for a field trip.
Anthony blows out the lamp, puts the microscope in a small wooden case and we leave the store. Word is that Berkelse Mere – the inland Berkel Lake – has changed color and Anthony wants a look. In winter the waters are quite clear, but in summer they turn cloudy and green. Local folklore blames the changes on honeydew. Anthony is dubious. His driver pulls a carriage to the front of the shop and we get in. We rattle down roughly paved streets past the outskirts of town, then two hours down a dusty country track to the lake. A fisherman on the shore is cleaning his gear and preparing his catch for market. Anthony needs a vial of water - from the middle of the mere, if you please. We buy some fish for dinner and the man consents to take us out on the lake in his boat, though he wonders a bit at our sanity – we travelled from Delft for what? As Anthony fills his vial, we look at each other and grin like village idiots. This is going to be good.
Back on land, Anthony takes the case from his cloak and reveals the microscope. Now the old man is curious. Anthony suspends a drop of the green water on his finger and transfers it to the pin on his device. He turns toward the sun, draws the lens to his face and changes the world. We know what he’s seeing – algae, ciliates, euglenoids, Protista of all kinds. In our experience microorganisms are a given, but in 1674 there are no PBS specials and no science kits from Toys“Я”Us; there is only Anthony and his lenses, and before that there was nothing. For a full minute Anthony stands perfectly still, his mouth gaping slightly. He passes the microscope around wordlessly. You look, I look, the carriage driver looks, the old man looks. “Het is een leugen. Een valstrik.” It’s a lie. A trick. The old man doesn’t believe what he sees. He won’t be the only one.
We go home and skip the inevitable arguments.
After we left, Anthony sat down in his workshop, stared at water drops and wrote a letter to the young Royal Society of London for Improving Natural Knowledge. It gave birth to microbiology.
“These animalcules had divers colors, some being whitish and transparent; others with green and very glittering little scales; others again were green in the middle, and before and behind white. Others yet were ashen grey. And the motion of most of these animalcules in the water was so swift, and so various, upwards, downwards, and round about, that it was wonderful to see: and I judge that some of these little creatures were above a thousand times smaller than the smallest ones I have ever yet seen, upon the rind of cheese, in wheaten flour, mould, and the like.” ~ Antonj van Leeuwenhoek, 1674
The Royal Society had seen Robert Hooke’s book. Fine, there were small things, but living creatures going about their business in a drop of water? They thought Anthony was drunk. After two years, and only after verification by a clergyman and by Hooke himself, the Society decided Anthony was sober and his animalcules were real.
“From all these observations, we discern most plainly the incomprehensible perfection, the exact order, and the inscrutable providential care with which the most wise Creator and Lord of the Universe had formed the bodies of these animalcules, which are so minute as to escape our sight.” ~AvL, 1674
The human race pushed through another false barrier and God became very small indeed.
We haven’t stopped looking. It was 150 years before someone duplicated Leeuwenhoek’s magnification and resolution, but quality optical microscopes eventually became commonplace. My microscope was a virtual toy, but it was just as powerful as the one we looked through in 1674. The microorganisms didn’t stay in the pond; we’ve found them on our own bodies. There are ten times as many microbial cells in your body as human cells. We’ve seen viruses, molecules, atoms. Field emission electron microscopes have given us the images of electron orbitals within a single atom. As I write, the Large Hadron Collider is trying to take pictures of a Higgs boson, which is a subatomic supersmall thing I don’t understand, plus several other subatomic supersmall things which I understand even less.
God’s big. Also, God’s small. Make up your mind.
Forget about God’s size. Instead, look at the implications of nature being limitless – too large to be measured and too small to be seen. When we assume all knowledge of nature is contained in what we can see right now, we fail miserably at learning. The chemist Humphry Davy said ”Nothing is so dangerous to the progress of the human mind than to assume that our views of science are ultimate, that there are no mysteries in nature, that our triumphs are complete and that there are no new worlds to conquer." Good man. The Royal Society made him president in 1820.
God leaves some things wide open. There is no end to nature, and therefore no end to God. There is no end to God, and therefore no end to what we can learn.
1 Time travel notwithstanding, I’m trying to make the science in this book accurate, but things get strange when you start talking about light speed. Light-speed travel would increase our mass to infinity. The ship would flatten out like a pancake. We would experience extreme time dilation, so time would pass more slowly for us than it would for an outside observer. Time would then speed up when we stopped to refuel or make repairs to the ship – stops possibly generations long. It’s hard to relate to, and I’m trying to make a point about distance rather than time, so I’m conveniently ignoring some of the real science for the sake of the story. Add together the dilated time, the frequent stops and the periods of acceleration and deceleration, we’ll call it an even 47 billion years.
2 You’re beginning to see the problem. Thirty years after I wrote the first version of this story I still don’t know how to address the basic logistical problems. That could be a result of my education, which focused on right-here-right-now Earth ecology and left me thin on exobiology, astrophysics and human physiology, but it’s not clear to me that engineers and theoreticians will ever have good supply solutions for an expedition like this. We know the distance between Earth and the furthest visible objects in space. We can calculate that much. But how to get people there? By revisiting the idea now, when I’m all grown up and smart-like, I know more of the things standing in the way. You would need to effectively build a new, sustainable society from scratch - without the benefit of a planet to do it on – and sling this society at 186,000 miles per second into space with no hope of assistance. Good luck. I almost prefer the version where I didn’t know any better because I could just get to the end of the journey without any planning.
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