NASA James Webb Space Telescope – 2017

National Aeronautics and Space Administration (NASA)

NASA Goddard Space Flight Center

Washington DC


James Webb Space Telescope

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The James Webb Space Telescope (JWST), previously known as Next Generation Space Telescope (NGST), is a part of NASA's ongoing Flagship program. It is under construction and scheduled to launch in 2018. The JWST will offer unprecedented resolution and sensitivity from long-wavelength (orange-red) visible light, through near-infrared to the mid-infrared (0.6 to 27 micrometers). While the Hubble Space Telescope has a 2.4-meter (7.9 ft) mirror, the JWST features a larger and segmented 6.5-meter-diameter (21 ft 4 in) primary mirror and will be located near the Earth–Sun L2 point. A large sunshield will keep its mirror and four science instruments below 50 K (−220 °C; −370 °F).
JWST's capabilities will enable a broad range of investigations across the fields of astronomy and cosmology. One particular goal involves observing some of the most distant events and objects in the Universe, such as the formation of the first galaxies. These types of targets are beyond the reach of current ground and space-based instruments. Another goal is understanding the formation of stars and planets. This will include direct imaging of exoplanets.
++ Read: NASA James Webb Space Telescope

NASA James Webb Space Telescope JWST Full Scale Model – For size comparison

Three major sections of the JWST include:

In December 2016, NASA announced that the JWST has passed major milestones, including completion of its primary mirror and integration of science instruments with the payload module, and is undergoing acoustic and extreme vibration testing to simulate launch conditions.


JWST Primary Mirror

JWST Scientific Instruments

The Integrated Science Instrument Module (ISIM) is a framework that provides electrical power, computing resources, cooling capability as well as structural stability to the Webb telescope. It is made with bonded graphite-epoxy composite attached to the underside of Webb's telescope structure. The ISIM holds the four science instruments and a guide camera.

The James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM) and Command and Data Handling (ICDH) engineering team uses SpaceWire to send data between the science instruments and the data-handling equipment.

James Webb Space Telescope (JWST)

L2 Orbit

The Telescope will be located near the Second Lagrange point (L2) of the Earth-Sun system, which is 1,500,000 kilometers (930,000 mi) from Earth, directly opposite to the Sun. Normally an object circling the Sun farther out than Earth would take longer than one year to complete its orbit, but near the L2 point the combined gravitational pull of the Earth and the Sun allow a spacecraft to orbit the Sun in the same time period of the Earth. The telescope will circle about the L2 point in a halo orbit, which will be inclined with respect to the ecliptic, have a radius of approximately 800,000 kilometers (500,000 mi), and take about half a year to complete. Since L2 is just an equilibrium point with no gravitational pull, a halo orbit is not an orbit in the usual sense: the spacecraft is actually in orbit around the Sun, and the halo orbit can be thought of as controlled drifting to remain in the vicinity of the L2 point. This requires some station-keeping: around 2–4 m/s per year from the total budget of 150 m/s. Two sets of thrusters constitute the observatory's propulsion system.

L2 Orbit L2 Orbit

Guidance for Attendees

JWST Primary Mirror

Students can expect to learn the science, physics, mechanics, materials, optics, instruments, instrumentation, vibration testing, acoustic testing, structural calibration and the leading innovations in James Webb Space Telescope; and learn how Science, Technology, Innovation and Leadership unites at one of the best agencies in the world to build and deploy an un-precedented Space-based-Telescope.

Hubble x JamesWebb

Hubble x JamesWebb

Ariane with JWST

Date

March/April 2017 @ 9am-3pm

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Shan Jin Shan Jin
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