Understanding Scientific Instruments
How spacecraft do science — the classes of instrument and the payloads that map worlds, read composition in light, and sense the invisible environment of space. Built on real NASA and ESA mission data; nothing is fabricated.
- 1.1What is a science payload?The instruments that turn a spacecraft into a scientific observatory.
- 1.2CamerasThe eyes of a spacecraft, from wide-angle to narrow-angle telescopes.
- 1.3SpectrometersSplitting light to read composition, temperature, and motion.
- 1.4Instruments by classThe families of instrument used across missions.
- 2.1Imaging spectrometersA spectrum for every pixel — mapping composition in an image.
- 2.2MagnetometersFeeling magnetic fields — and the hidden oceans they reveal.
- 2.3Radar and altimetersActively probing surfaces through cloud and darkness.
- 2.4SeismometersListening to a planet's interior, as InSight did at Mars.
- 3.1Mass spectrometersSorting atoms by mass to identify chemistry and isotopes.
- 3.2Fields and particlesSensing the plasma, dust, and radiation of space.
- 3.3Radio scienceUsing the spacecraft's own signal to weigh a planet.
- 3.4A famous instrument: SEISThe seismometer that first mapped the interior of Mars.
Related entities
- Instrument class
Optical Camera
An imaging instrument that records visible (and often near-infrared or ultraviolet) light — the eyes of a spacecraft, from wide-angle context cameras to high-resolution narrow-angle telescopes.
- Instrument class
Spectrometer
An instrument that splits light into its component wavelengths to reveal composition, temperature, and motion — the workhorse of remote sensing, spanning ultraviolet, visible, infrared, X-ray, and gamma-ray bands.
- Scientific instrument
SEIS (Seismic Experiment for Interior Structure)
InSight's ultra-sensitive seismometer, which detected hundreds of marsquakes and, for the first time, revealed the internal structure of Mars.
- Scientific instrument
LORRI (Long Range Reconnaissance Imager)
New Horizons's high-resolution narrow-angle telescope camera, which returned the first detailed images of Pluto and the Kuiper Belt object Arrokoth.