The mass of the James Webb Space Telescope (JWST) is about half that of the Hubble Space Telescope. Webb has a 6.5-meter-diameter (21-foot) gold-coated beryllium primary mirror made up of 18 separate hexagonal mirrors.

2024年8月22日 · The James Webb Space Telescope (sometimes called JWST or Webb) is an orbiting infrared observatory that will complement and extend the discoveries of the Hubble Space Telescope, with longer wavelength coverage and greatly improved sensitivity.

2018年5月31日 · The size of Webb's primary mirror — 6.5 meters (21.6 feet) across — was determined by scientists and engineers in order for the telescope to observe distant galaxies at over 13 billion light-years away.

JWST will have a large mirror, 6.5 meters (21.3 feet) in diameter and a sunshield the size of a tennis court. Both the mirror and sunshade won't fit onto the rocket fully open, so both will fold up and open once JWST is in outer space. JWST will reside in an orbit about 1.5 million km (1 million miles) from the Earth.

The James Webb Space Telescope orbits the Sun at Lagrange Point 2 (L2), about one million miles from Earth. Webb’s primary mirror is significantly larger than Hubble’s with a diameter of about 6.6 meters and a collecting area of about 25 square meters.

2025年2月26日 · The James Webb Space Telescope is the largest, most technically advanced telescope ever built. Its larger size and richer infrared views allow it to go beyond Hubble’s Deep Field observations to peer back over 13.5 billion years, witnessing the first stars and galaxies forming out of the darkness of the early universe.

The James Webb Space Telescope is peering into the past to unlock the mysteries of our universe. Learn about the technical details of this ambitious mission.

2023年4月27日 · Primary mirror size: 21.3 feet (6.5 meters) across. Sunshield: 69.5 ft by 46.5 ft (22 meters x 12 meters). Mass: 14,300 lbs (6,500 kg). The James Webb Space Telescope (JWST) is the largest...

2020年1月14日 · The James Webb Space Telescope primary mirror is 6.5 meters (21 feet 4-inches) across. The Hubble Space Telescope primary mirror is 2.4 meters (8-feet) across. The Webb Telescope's longest segment is its sunshield at 21.18 meters (69.5 feet) long.

詹姆斯·韦布空间望远镜 （英文：James Webb Space Telescope，缩写：JWST，简称：韦布空间望远镜 [34] ， ），是 美国航空航天局 、 欧洲航天局 和 加拿大国家航天局 联合研发的 红外线 观测用 空间望远镜 ，为 哈勃空间望远镜 的继任者 。