by Neil deGrasse Tyson
From Natural History Magazine, June 2002
Few things are more annoying to avid moviegoers than being accompanied to a film by hyper-literate friends who can't resist making comments about why the book was better. These people babble on about how the characters in the novel were more fully developed or how the original story line was more deeply conceived. In my opinion, they should just stay home and leave the rest of us to enjoy the film. For me, it's purely a matter of economics: it's cheaper and faster to see a movie than to buy and read the book on which it was based. With this anti-intellectual attitude, I ought to be mute every time I notice scientific transgressions in a movie's story or set design. But I am not. On occasion, I can be as annoying as bookworms to other moviegoers. Over the years, I have collected especially egregious errors in Hollywood's attempts to show or engage the cosmos. And I can no longer keep them to myself.
My list, by the way, does not consist of bloopers. A blooper is a mistake that the producers or continuity editors happen to miss, but normally catch and fix. The astro-errors I'm talking about were willingly introduced and indicate a profound lack of attention to easily checkable detail. I would further assert that none of these writers, producers, or directors ever took Astronomy 101 in college.
Let's start at the bottom.
At the end of the 1977 Disney film Black Hole, which sits on many people's ten-worst movies list (including mine), an H.G. Wellsian space ship loses control of its engines and plunges into a black hole. What more could special-effects artists ask for? Let's see how well they did. Was the craft and its crew ripped apart by the ever-increasing tidal forces of gravity—something a real black hole would do to them? No. Was there any attempt to portray relativistic time dilation, as predicted by Einstein, where the universe around the doomed crew evolves rapidly over billions of years while they, themselves, age only a few ticks of their wristwatches? No. The scene did portray a swirling disk of accreted gas around the black hole. Good. Black holes do this sort of thing with gas that falls towards them. But did elongated jets of matter and energy spew forth from each side of the accretion disk? No. Lastly, did the ship travel through the black hole and get spit out into another time? another part of the universe? or in another universe altogether? No. Instead of capturing these cinematically fertile and scientifically informed ideas, the storytellers depicted the black hole's innards as a dank cave, with fiery stalagmites and stalactites, as through we were touring Carlsbad Caverns' hot and smoky basement.
Some people may think of these scenes as expressions of the director's poetic or artistic license, allowing him to invent whimsical cosmic imagery without regard to the real universe. But given how lame the scenes were, they are more likely to have been an expression of the director's scientific ignorance. Suppose there were such a thing as
scientific license, where a scientist, doing art, chooses to ignore certain fundamentals of artistic expression. Suppose that whenever scientists drew a woman they gave her three breasts, seven toes on each foot, and an ear in the middle of her face? In a less extreme example, suppose scientists drew people with the knee joint bending the wrong way, or with odd proportions among the body's long bones? If this did not start a new movement in artistic expression—akin to Picasso's flounder-like renderings of the human face—then artists would surely tell us all to go back to school immediately and take some art classes in basic anatomy.
Was it license or ignorance that led the painter of a work in the Louvre to draw a cul-de-sac surrounded by erect trees, each with a Sun-made shadow pointing in toward the center of the circle? Hadn't the artist ever noticed that all shadows cast by the Sun on vertical objects are parallel? Is it license or ignorance that nearly every Moon ever painted by artists is either a crescent or a full moon? Half of any month the Moon's phase is neither crescent nor full. Did the artists paint what they saw or what they wished they had seen? When Francis Ford Coppola's 1987 Someone to Watch Over Me was being filmed, his cinematographer called my office to ask when and where was the best occasion to film the full Moon rising over the Manhattan skyline. When I instead offered him the first quarter moon, or the waxing gibbous moon he was unimpressed. Only the full Moon would do.
Although I rant, there's no doubt that creative contributions from the world's artists would be poorer in the absence of artistic license. Among other losses, there would have been no Impressionism or Cubism. But what distinguishes good artistic license from bad is whether or not the artist acquired access to all relevant information before the creativity begins. Perhaps Mark Twain said it best:
First get your facts; and then you can distort them at your leisure.
In the 1997 blockbuster movie Titanic, producer and director James Cameron not only invested heavily in special effects but also in recreating the ship's luxurious interiors. From the wall sconces to the patterns on the china and silverware, no detail of design was too small to attract the attention of Mr. Cameron, who made sure to reference the latest artifacts salvaged from missions to the sunken ship, more than two miles under sea. Furthermore, he carefully researched the history of fashion and social mores to ensure that his characters dressed and behaved in ways generally consistent with the year 1912. Aware that the ship was designed with only three of its four smoke stacks connected to engines, Cameron accurately portrays smoke coming from only three stacks. We know from accurate records of this maiden voyage from Southampton to New York City the date and time the ship sank, as well as the longitude and latitude on Earth where it sank. Cameron captures that too.
With all this attention to detail, you think James Cameron might have paid a bit more attention to which stars and constellations were visible on that fateful night.
In the movie, the stars above the ship bear no correspondence to any constellations in a real sky. Worse yet, while the heroine bobs and hums a tune on a slab of wood in the freezing waters of the North Atlantic, she stares straight up and we are treated to her view of this Hollywood sky—one where the stars on the right half of the scene trace the mirror image of the stars in the left half. How lazy can you get? To get it right would not have required a major realignment of the film's budget.
What's odd is that nobody would have known whether Cameron captured his plate and silverware patterns accurately. Whereas for about fifty bucks you can buy any one of a dozen programs for your home computer that will display the real sky for any time of day, any day of the year, any year of the millennium, and for any spot on Earth.
On one occasion, however, Cameron exercised artistic license commendably. After the Titanic sank, you see countless people (dead and alive) floating in the water. Of course, on this moonless night in the middle of the ocean, you would barely see the hand in front of your face. Cameron had to add illumination so that the viewer could follow the rest of the story. The lighting was soft and sensible, without obvious shadows indicating an embarrassing (and non-existent) source of light.
The only time I ever bothered to compose a letter complaining about an a cosmic mistake was after I saw the 1991 romantic comedy L.A. Story, written and produced by Steve Martin. In this film, Martin uses the Moon to track time by showing its phase progressing from crescent to full. A big deal is not made of this fact. The Moon just hangs there in the sky from night to night. I applaud Martin's effort to engage the universe in his plotline, but this Hollywood moon grew in the wrong direction. Viewed from any from location north of Earth's equator (Los Angeles qualifies), the Moon's illuminated surface grows from right to left.
When the Moon is a thin crescent, you can find the Sun twenty or thirty degrees to its right. As the Moon orbits Earth, the angle between it and the Sun grows, allowing more and more of its visible surface to be lit, reaching 100 percent frontal illumination at 180 degrees. (This monthly Earth-Sun-Moon configuration is known as syzygy, which reliably gives you a full Moon and, occasionally, a lunar eclipse.)
Steve Martin's moon grew from left to right. It grew backwards. My letter to Mr. Martin was polite and respectful, written on the assumption that he would want to know the cosmic truth. Alas, I received no reply, but then again, I was only in graduate school at the time, without a weighty letterhead to grab his attention.
Even the 1983 macho test-pilot epic The Right Stuff had plenty of the wrong stuff. In my favorite transgression, Chuck Yeager, the first to fly faster than the speed of sound, is shown ascending to 80,000 feet, setting yet another altitude and speed record. Ignoring the fact that the scene takes place in California's Mojave dessert, where clouds of any species are rare, as Yeager darts through the air you see puffy, white, alto-cumulus clouds whizzing by. This error would surely irk meteorologists because, in Earth's real atmosphere, these clouds would not be caught dead above 20,000 feet.
Without those visual props, I suppose the viewer would have no visceral idea of how fast the plane was moving. So I understand the motive. But the film's director, Philip Kaufman, was not without choices: Other kinds of clouds, such as cirrus, and the especially beautiful noctilucent clouds, do exist at very high altitudes. At some point in your life you have to learn that they exist.
The 1996 film Contact, written by Carl Sagan and Ann Druyan contains an especially embarrassing asto-gaffe. Inspired by Sagan's 1983 novel of the same name (I saw the movie, but never read the book, but everyone who has read the book says it's better than the movie—of course) Contact explores the probability of humans finding intelligent life in the galaxy and then establishes contact with it. The heroine astrophysicist alien hunter is actress Jodi Foster, who recites a fundamental line that contains mathematically impossible information. Just as she establishes her love interest in ex-priest Mathew McConaughey, seated with the largest radio telescope in the world behind them, she says to him with passion:
If there are 400 billion stars in the galaxy, and just one in a million had planets, and just one in a million of those had life, and just one in a million of those had intelligent life, that still leaves millions of planets to explore. Wrong. According to her numbers, that leaves 0.0000004 planets with intelligent life on them, which is a figure somewhat lower than
millions. No doubt that
one in a million sounds better on screen than
one in ten, but you can't fake math.
Ms. Foster's recitation was not a gratuitous expression of math, it was an explicit recognition of the famous
Drake Equation, named for Astronomer Frank Drake who first calculated the likelihood of finding intelligent life in the galaxy based on a sequence of factors, starting with the total number of stars in the galaxy. For this reason, it was one of the most important scenes in the film. Who do we blame for the flub? Not the screen writers, even though their words were spoken verbatim. I blame Jodi. As the lead actress, she forms the last line of defense against errors that creep into the lines she delivers. She must bear some responsibility. Not only that, last I checked, she was a graduate of Yale University. Surely they teach arithmetic there.
During the 1970s and 1980s, the popular television soap opera As The World Turns showed the Sun rising while the show opened and setting as the credits rolled at the end, which, given the show's title, was a nice cinematic gesture. Unfortunately, their sunrise was a sunset shown in reverse. Nobody took the time to notice that for every day of the year in the Northern Hemisphere the Sun moves at an angle up and to the right of the spot on the horizon where it rises. At the end of the day, it descends across the sky at an angle down and to the right. The soap-opera sunrise showed the Sun moving toward the left as it rose. They obviously had gotten a piece of film showing a sunset and played it in reverse for the show's beginning. The producers were either too sleepy to wake up early and film the sunrise, or the sunrise was filmed in the Southern Hemisphere—after which the camera crew ran to the Northern Hemisphere to film sunset. Had they called their local astrophysicists, any one of us might have recommended that if they needed to save money, they could have shown the sunset in a mirror before they showed it running backward. This would have taken care of everybody's needs.
Of course, inexcusable astro-illiteracy extends beyond television, film, and paintings of the Louvre. The famous star-studded ceiling of New York City's Grand Central Terminal rises high above the countless busy commuters. I would gripe less if the original designers had no pretense of portraying an authentic sky. But this three-acre canvas contains among its several hundred stars a dozen real constellations, each traced in their classical splendor, with the Milky Way flowing by, just where you're supposed to find it. Holding aside the sky's greenish color, which greatly resembles that of Sears household appliances from the 1950s, the sky is backwards. Yes, backwards. This was common practice during the Renaissance when globe-makers made celestial spheres. In those cases, you, the viewer, stand in a mythical place
outside of the sky, looking down, with Earth imagined to occupy the globe's center. This argument works well for spheres smaller than you, but fails miserably for 130-foot ceilings. And amid the backwardness, for reasons I have yet to divine, the stars of the constellation Orion are positioned forward, with Betelgeuse and Rigel correctly oriented.
Astrophysics is surely not the only science trod upon by under-informed artists. Naturalists have probably logged more gripes than we have. I can hear them now:
That's the wrong whale song for the species of whale they showed in the film.
Those plants are not native to that region.
Those rock formations have no relation to that terrain.
The sounds made by those geese are from a species that flies nowhere near that location.
They would have us believe it's the middle of the winter yet that oak tree still has all its leaves.
In my next life, what I plan to do is open a school for artistic science, where creative people can be accredited in their knowledge of the natural world. Upon graduating, they would be allowed to distort nature only in informed ways that advance their artistic needs. As the end-credits roll by, the director, producer, set designer, cinematographer, and whoever else was accredited, would proudly list their membership with S C I P A L, the Society for Credible Infusion of Poetic and Artistic License.
Neil deGrasse Tyson, an astrophysicist, is the Frederick P. Rose Director of New York City’s Hayden Planetarium and a visiting research scientist at Princeton University.