We have officially
installed all the inner parts
of NASA's Nancy Grace Roman Space Telescope.
But inside this outer barrel assembly,
it's a really tight fit
and we had to install each of the instruments
in a really specific order.
The first of the big steps
was to use a special counter-weighting tool
to install the coronagraph into the instrument carrier,
and then the whole mirror assembly
was lifted on top of the instrument carrier.
Next, the Wide Field Instrument
was then added to the instrument carrier
and mirror assembly combo.
Finally, that whole science collecting unit
was lifted onto the spacecraft bus,
which drives and operates the telescope.
And that completes all of the internal parts
of the Nancy Grace Roman Space Telescope.