The Science
The Light Is Real. So Is the Distance.
Everything we print began as data from a telescope in orbit. This page explains where these images come from, how they are made, and which parts of them are measurement rather than interpretation.
Start here
Every image on this site is a photograph of a place.
Not a painting. Not a render. Not an artist's impression of what somewhere might look like. A telescope pointed at a real region of space, collected the light arriving from it, and recorded what was there.
That distinction matters more than it sounds. Most of the space art sold online is illustration, and a growing share of it is generated by software that has never been anywhere near a telescope. What you are looking at here is the opposite: measurement. Photons that left an object thousands or millions of years ago, crossed the distance, and landed on a detector in orbit.
The object in the frame is still there. It is doing what it was doing when the light left. You are simply seeing the report late.
Two machines
Hubble and Webb see different things, which is why their images look different.
Hubble works mostly in visible light, close to what your own eye is sensitive to. That is why its pictures feel familiar. Its view of a nebula is roughly the view you would get if your eye were enormous, perfectly steady, and parked above the atmosphere.
Webb works in infrared, which your eye cannot detect at all. Infrared passes through dust that stops visible light, so Webb sees into places Hubble simply cannot. Point both at the same object and you get two genuinely different photographs, neither of them wrong.
Where the same object appears twice in our collection, that is usually why. The Pillars of Creation in visible light and in infrared are the same structure, photographed by two different kinds of eye.
James Webb Space Telescope
Hubble Space Telescope
The invisible half
Three things infrared shows you that visible light hides.
- It goes through dust. Star-forming regions are wrapped in thick clouds of it. In visible light you photograph the outside of the cloud. In infrared you see the stars forming inside it.
- It catches the oldest light there is. The universe has been expanding for the entire journey, stretching that light toward the red end of the spectrum. Light from the earliest galaxies has been stretched so far that it now arrives as infrared. Visible-light telescopes cannot see it at all.
- It sees cold things. Infrared is heat. Objects far too cold to glow visibly still glow in infrared, which is how you photograph a disc of debris around a young star, or a planet that produces no light of its own.
This is also why Webb has to be kept colder than the things it photographs. A warm telescope would blind itself with its own heat, which is what the sunshield is for.
From detector to print
How a telescope image is actually made.
Nobody points a color camera at a nebula and presses a button. The process is closer to measurement than to photography, and understanding it answers most questions people have about whether these pictures are real.
The telescope stares
Long exposures, sometimes hours, through one narrow filter at a time. Each filter admits a specific slice of the spectrum. Every frame that comes back is monochrome.
The same patch is shot repeatedly
Multiple exposures of the same field let cosmic ray strikes, dead pixels and detector artefacts be identified and removed, because they do not repeat in the same place.
The frames are aligned and stacked
Combining exposures pulls faint signal out of the noise. Wide images are mosaics, stitched from many overlapping pointings taken at different times.
Each filter is assigned a color
The filters are placed in wavelength order. The shortest becomes blue, the longest becomes red, the ones in between fill the middle. This is the step people mean when they ask whether the colors are real.
The brightness scale is stretched
A nebula's bright core and its faint outer wisps can differ by a factor of thousands. On a linear scale you can show one or the other, never both. Stretching the scale makes the whole structure visible at once.
It is released to the public
The finished image goes into the NASA and STScI archives. That is where we source ours, at the highest resolution published.
The honest answer
Are the colors real?
Partly. It deserves a straight answer rather than a marketing one.
The structure is entirely real. Every filament, pillar, shell and star in these images was measured. Nothing is painted in, moved, or invented.
The color is assigned. The telescope records in monochrome, one filter at a time. Someone then decides which visible color represents which filter, and the convention is to keep them in order: shortest wavelength to blue, longest to red.
For Hubble's visible-light images, that lands close to what your eye would see. For Webb's infrared images, it cannot, because there is no such thing as what infrared looks like to a human. The color is a translation of something real into something visible.
The closest everyday comparison is a map. Contour lines are not painted on the landscape, and the colors on a weather map are not the colors of the air. Nobody would call either one fake. They are a legend for real measurements, which is exactly what these are.
So: a translation, not an invention. We would rather tell you that plainly than let you find out later.
The point
A print of a real place is a different object from a print of an idea.
Decorative space art is easy to find and easy to ignore. It is a shape and a color palette. There is nothing behind it, so after a fortnight on the wall it stops registering.
A photograph behaves differently, because the fact underneath it does not wear off. The Pillars of Creation are roughly four light-years tall, which is close to the distance between our Sun and the next star. Centaurus A is eleven million light-years away, so the light in that frame left before anything resembling a human being existed. Those statements stay true every time somebody asks what it is.
That is the whole argument for buying one of these instead of a poster. Not that it is prettier. That it is true, and that it stays interesting because of it.