Thus a solar eclipse is possible only when the moon is exactly on that earth-sun line, and in the new phase.
(a solar eclipse; is; possible; T:only when the moon is exactly on that earth-sun line, and in the new phase) (the moon; is; exactly on that earth-sun line, and in the new phase)
a solar eclipse the moon
is is
possible T:only when the moon is exactly on that earth-sun line, and in the new phase
exactly on that earth-sun line, and in the new phase