Sobre os arquivos FITS
Imagem Astronômica FITS
Flexible Image Transport System — padrão astronômico desde 1981 (NASA, IAU). Armazena dados científicos com metadados extensos. Usado por Hubble, JWST, telescópios.
Família
Raster & Vector Images
Extensão
.fits
Tipo MIME
image/fits
Pode ser usado como
COMO NASCEU O
FORMATO FITS.
FITS — Flexible Image Transport System — was designed in 1981 by Don Wells (NRAO), Eric Greisen (NRAO), and Ron Harten (Dwingeloo Observatory) as the standard astronomical data interchange format. The IAU formally endorsed it in 1982. A FITS file is astonishingly self-documenting: every file begins with an ASCII header listing every variable, unit, coordinate system, instrument, and observation timestamp. After the header come 2D, 3D, or N-dimensional data arrays at whatever precision the telescope captured.
Every major telescope on Earth and in orbit produces FITS. Hubble, JWST, Chandra, the Very Large Telescope, every CCD-equipped backyard astronomer — all write FITS. NASA’s public Hubble archive holds over 2 million FITS files, available for anyone to download. The format is older than TCP/IP and still the backbone of astronomy in 2026. Wells’ deliberate design choice — keep the format simple, text-headered, and forever stable — is widely cited as a triumph of scientific data stewardship.
CURIOSIDADES E
FATOS INTERESSANTES.
Every raw image from the Hubble, James Webb, Chandra, and essentially every professional telescope is a FITS file.
FITS was ratified in 1982 and has maintained complete backward compatibility — files from 1982 open identically in 2026 software.
NASA's Mikulski Archive for Space Telescopes (MAST) holds over 2 million public Hubble FITS files free to download.
FITS headers are ASCII text with 80-character records — you can open a FITS in Notepad and read the observation's metadata directly.
The format can hold images, spectra, binary tables, and any n-dimensional array — one container for astronomy's entire data spectrum.
VANTAGENS E
LIMITAÇÕES.
Vantagens
- Self-documenting — every file carries complete observational metadata.
- Lossless — bit-exact storage of detector readouts.
- Stable since 1981 with zero breaking changes.
- Mandatory for professional astronomy — every research publication uses it.
- Open standard endorsed by IAU.
Limitações
- Niche — used almost exclusively in astronomy.
- File sizes are large (no default compression).
- Not a display format outside specialized viewers (DS9, AstroBin).
- Consumer imaging apps don't understand FITS.
Tamanhos típicos de arquivo
Backyard-telescope CCD shot (5 MP)
10-30 MB
Hubble WFC3 single exposure
~65 MB
JWST NIRCam full detector
~650 MB
Especificações técnicas
- MIME type
- image/fits
- Extensions
- .fits, .fit, .fts
- Standard
- IAU-endorsed FITS 4.0 (latest revision)
- Header records
- 80-character ASCII cards
- Encoding
- IEEE big-endian integers and floats
CONVERTER A PARTIR DE
FITS
Casos de uso comuns
Astronomy, telescope data, satellite imagery, scientific imaging
Formatos relacionados
Comparativos populares
FITS vs JPG
Diferenças, tamanho de arquivo e quando escolher cada formato.
FITS vs PNG
Diferenças, tamanho de arquivo e quando escolher cada formato.
FITS vs WEBP
Diferenças, tamanho de arquivo e quando escolher cada formato.
FITS vs AVIF
Diferenças, tamanho de arquivo e quando escolher cada formato.
FITS vs GIF
Diferenças, tamanho de arquivo e quando escolher cada formato.
FITS vs BMP
Diferenças, tamanho de arquivo e quando escolher cada formato.
Conversões populares de FITS
Os destinos mais procurados ao converter arquivos FITS.
Perguntas frequentes sobre FITS
Perguntas frequentes
FITS (FITS Astronomical Image) is an image formato used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family e designed around a specific trade-off between tamanho do arquivo, visual fidelity, e feature support (transparency, colour depth, compressão type). Photographers, web designers, e content creators choose FITS when its particular strengths match the publishing target.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) abrir FITS natively. On mobile, iOS Photos e Google Photos display FITS no gallery when suportado por the OS. If the formato is rare ou new, converter to JPG ou PNG first — both are universally readable — usando our FITS to JPG ou FITS to PNG converter.
Upload the FITS to KaijuConverter e pick a target formato (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in o navegador via ImageMagick e returns a baixar in seconds. No account ou installation required; both input e output delete automatically within two hours.
Depende de the task. JPG is the smallest tamanho do arquivo para photographs; PNG is sem perdas com transparência; FITS has its own niche that may favour colour depth, animation, ou codificação efficiency over one ou both of those. para the final web publish, test all three e measure tamanho do arquivo plus visible quality on real content.