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JWST is an infrared space telescope built to observe objects that are too faint, distant, or ancient for Hubble to study effectively.
JWST’s scientific goals include studying the first stars and galaxies, tracing galaxy formation and evolution, investigating the early history of the universe, examining star and planet formation, observing Solar System objects, and characterizing the atmospheres of exoplanets, including potentially habitable worlds. Its instruments provide imaging and spectroscopy from approximately 0.6 to 28.5 micrometers, enabling scientists to analyze the chemical composition, temperatures, and physical properties of astronomical targets. The telescope operates near the Sun–Earth L2 point, where its five-layer sunshield keeps it cold enough to make sensitive infrared measurements.
JWST is an infrared space telescope built to observe objects that are too faint, distant, or ancient for Hubble to study effectively.
Its main scientific objective is to investigate the early universe, including the formation of the first stars and galaxies.
JWST studies galaxy evolution, star and planet formation, Solar System objects, and exoplanet atmospheres.
The telescope’s 6.5-meter segmented mirror provides a collecting area more than six times larger than Hubble’s.
Its instruments cover wavelengths from about 0.6 to 28.5 micrometers and provide both imaging and spectroscopy.
A five-layer sunshield and an orbit near the Sun–Earth L2 point keep JWST extremely cold, reducing interference from the telescope’s own infrared radiation.
The study of astronomical objects and phenomena using infrared radiation, which is especially useful for observing cool, dusty, or highly redshifted objects.
A region about 1.5 million kilometers from Earth where JWST maintains an orbit that supports stable cooling, communications, and observations.
The shift of light toward longer wavelengths caused by the expansion of the universe or the motion of an object away from the observer.
The analysis of light by wavelength to determine the chemical composition, temperature, motion, and physical properties of astronomical objects.
The layer of gases surrounding a planet outside the Solar System, which JWST can analyze to identify its composition and potential habitability.
JWST’s five-layer protective barrier that blocks heat and light from the Sun, Earth, and Moon to keep the telescope cold.
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