What is the largest space telescope ever built?

What is the largest space telescope ever built?

• A. James Webb Space Telescope
• B. Hubble Space Telescope
• C. Spitzer Space Telescope
• D. Kepler Space Telescope

Answer: (A)

The largest space telescope is determined by the size of its primary mirror. The James Webb Space Telescope has a 6.5-meter primary mirror, which is far larger than the others listed. Hubble's mirror is 2.4 meters, Spitzer's is about 0.85 meters, and Kepler's is around 0.95 meters. A bigger mirror collects more light and can resolve finer details, especially at infrared wavelengths, letting Webb observe fainter, more distant objects. That combination of a much larger aperture and infrared capability is why Webb stands as the largest space telescope ever built.

The largest space telescope is determined by the size of its primary mirror. The James Webb Space Telescope has a 6.5-meter primary mirror, which is far larger than the others listed. Hubble's mirror is 2.4 meters, Spitzer's is about 0.85 meters, and Kepler's is around 0.95 meters. A bigger mirror collects more light and can resolve finer details, especially at infrared wavelengths, letting Webb observe fainter, more distant objects. That combination of a much larger aperture and infrared capability is why Webb stands as the largest space telescope ever built.