English to French Science Astronomy & Space

- The light comes down
from the telescope up here,
strikes that mirror, it's sent sideways
into this room here, which
contains the spectrograph,
and we put the hydrogen fluoride tube
into the telescope beam
right here so that the light
went through it, and
into the spectrograph.
- [Voiceover] Walker,
Yang, and Bruce Campbell
had the revolutionary idea
that passing the star's light
through a gas would build a sort of ruler
into every light measurement,
making it possible
to see much smaller color
changes from the star's wobble.
They decided to test the theory
by measuring Jupiter's tug on our sun.