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James Webb is located 1.5 million kilometers from Earth, has a golden mirror with 18 segments, and reveals hidden details of the universe in infrared light.

Written by Fabio Lucas Carvalho

Published on 31/05/2026 at 11:34

Science and Technology

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Installed about 1.5 million kilometers from Earth, the James Webb Space Telescope gathers engineering solutions that include a 6.6-meter segmented mirror, a five-layer sunshield, and infrared observation to study galaxies, forming stars, and exoplanet atmospheres.

The James Webb Space Telescope has become one of the most important scientific instruments in modern astronomy by enabling deep observations of the universe in infrared light. Launched to study ancient galaxies, forming stars, and atmospheres of planets outside the Solar System, the observatory also draws attention for its engineering curiosities.

One of them is its position in space. Unlike the Hubble, which orbits Earth, the James Webb operates in a region known as L2, about 1.5 million kilometers from the planet. This point allows greater stability to observe the cosmos and keep the telescope aligned with its sunshield.

Main Mirror

Another highlight is its main mirror. It is composed of 18 gold hexagonal segments, which together form a structure approximately 6.6 meters in diameter. This size increases the ability to capture light from very distant and faint objects, essential for understanding the early phases of the universe.

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To reach space, however, the Webb had to be folded. Its size did not fit completely open in the rocket, so the structure was launched compacted and then unfolded in a carefully planned sequence, often compared to a space origami.

The way the telescope views the universe is also special. The Webb primarily observes in the infrared, a light range capable of penetrating dust clouds and revealing hidden regions where stars and planetary systems may be forming.

The fifth curiosity is the five-layer sunshield. This protection drastically reduces the heat received from the Sun, Earth, and Moon, keeping the scientific instruments at extremely low temperatures. Without this insulation, the telescope’s own heat could interfere with the measurements.

These characteristics explain why the James Webb is considered one of the most complex space missions ever put into operation by humanity in recent decades of scientific exploration.

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James Webb is located 1.5 million kilometers from Earth, has a golden mirror with 18 segments, and reveals hidden details of the universe in infrared light.

Installed about 1.5 million kilometers from Earth, the James Webb Space Telescope gathers engineering solutions that include a 6.6-meter segmented mirror, a five-layer sunshield, and infrared observation to study galaxies, forming stars, and exoplanet atmospheres.

Main Mirror

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James Webb is located 1.5 million kilometers from Earth, has a golden mirror with 18 segments, and reveals hidden details of the universe in infrared light.

Installed about 1.5 million kilometers from Earth, the James Webb Space Telescope gathers engineering solutions that include a 6.6-meter segmented mirror, a five-layer sunshield, and infrared observation to study galaxies, forming stars, and exoplanet atmospheres.

Main Mirror

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

They planted a sea of eucalyptus to produce cellulose, but the monoculture turned into a green desert, dried up springs and rivers, and pushed families out of regions in Minas Gerais and Bahia.

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