WEBVTT FILE

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One month after launch, the
James Webb Space Telescope ...

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arrived at its orbital
destination.

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Webb will perform its science
mission while orbiting ...

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a location in space, called the
second Lagrange point, ...

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or L2 for short ...

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It is located one million miles
from Earth.

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As Webb orbits L2, the telescope
stays in line with Earth ...

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as it travels around the Sun.

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L2 is a point where the
gravitational influences of ...

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the Earth and Sun balance the
centripetal force of a ...

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small object orbiting with them.

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The telescope's optics and
instruments need to be kept ...

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very cold to be able to observe
the very faint infrared ...

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signals of very distant objects
clearly.

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This location is perfect for
Webb's sunshield to ...

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block out light and heat
from the Sun, Earth and Moon.

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Unlike the Hubble Space
Telescope, Webb's orbit ...

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keeps the spacecraft out of
Earth's shadow ...

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making L2 a thermally stable
location for the observatory ...

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to operate at.

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Webb will operate within its
field of regard.

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The "field of regard" refers to
the angles the telescope ...

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can move while staying in the
shadow of the Sun.

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Each of Webb's instruments has
its own field of view. ...

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The field of view is the area of
sky an instrument can observe.

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While Webb is orbiting, it's
fine steering mirror keeps ...

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images stable while it is
pointing at a target.

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The commissioning process will
be complete approximately ...

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six months after launch, at
which time Webb will ...

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start its science mission ...

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Helping to uncover more of the
mysteries of out Universe.

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