Changes

The telescope's mirror is 6.5-meters in diameter, compared to Hubble's 2.4-meter mirror. It will observe from the Earth–Sun L₂ Lagrange point, which is 1.5 million kilometers above the Earth. This point is well beyond orbit of the moon, which is 400,000 kilometers from the Earth.

The telescope's mirror is 6.5-meters in diameter, compared to Hubble's 2.4-meter mirror. It will observe from the Earth–Sun L₂ Lagrange point, which is 1.5 million kilometers above the Earth. This point is well beyond orbit of the moon, which is 400,000 kilometers from the Earth.

A shield will allow the telescope to investigate the infrared spectrum free from the interference of radiation from the Earth and Sun. The further away a galaxy is, the more redshifted its light becomes by the time it arrives. Webb's infrared capability means that it will be able to detect far older galaxies than Hubble is able to. It also allows the telescope to see threw dust clouds that obscured Hubble's view.

A shield will allow the telescope to observe the infrared spectrum free from the interference of radiation from the Earth and Sun. The further away a galaxy is, the more redshifted its light becomes by the time it arrives. Webb's infrared capability means that it will be able to detect far older galaxies than Hubble is able to. It also allows the telescope to see threw dust clouds that obscured Hubble's view.

While the Hubble telescope was upgraded with a corrective lens in 1993 and additional cameras in 1997 and in 2009, the Webb telescope will be too far from Earth for repairs or upgrades.

While the Hubble telescope was upgraded with a corrective lens in 1993 and additional cameras in 1997 and in 2009, the Webb telescope will be too far from Earth for repairs or upgrades.