The full opposition
A Full Moon happens when the Moon moves to the opposite side of the sky from the Sun — a hundred and eighty degrees away, an opposition (two bodies facing each other across the chart). The whole lunar face is lit; the Full Moon rises in the east as the Sun sets in the west, stays up all night, and sets at dawn. It is the only night of the month the Moon is visible from dusk to dawn. Symbolically it is the cycle's peak — what was seeded in the dark now fully shown — and the start of the turn toward release. The eight stages live in . Because the Moon and Sun stand opposite, they always sit in facing signs, and that pair gives each Full Moon its charge.
The Moon at home, at her brightest
Here is the fact that belongs only to this Full Moon: Cancer is the Moon's own sign, her domicile, the place she rules and is most herself (see ). At a Cancer Full Moon she is both completely illuminated and on her home ground — the lunar body doubled, undiluted, at the brightest point of the cycle. It is the most feeling-saturated Full Moon of the year: tides of mood run high, memory surfaces, the body wants its people and its place. (More on the lunar nature is at .)
Across the sky sits the Sun in Capricorn. Cancer is cardinal water — home, family, the inner sense of belonging, the roots. Capricorn is cardinal earth — work, duty, reputation, the public role, the climb. This is the home-and-world axis, and at this Full Moon both ends are lit at once. The Capricorn Sun answers to Saturn, planet of structure and obligation; the Cancer Moon answers to herself, keeper of the heart's needs. So the night sets the demands of the outer life against the needs of the inner one — the meeting that ran long against the dinner that went cold, the career that asks everything against the home that quietly waits.
Inhabiting the polarity
The work is not to declare home the winner and duty the loser, or the reverse. The Cancer Moon is right that belonging matters and that a life of pure obligation goes hollow; the Capricorn Sun is right that feeling is not a permission slip to abandon what you have built. The tension is the material. At the Cancer end the failure is drowning in mood and using it to dodge responsibility. At the Capricorn end it is the cold competence that has forgotten it has a home to come back to.
So let the feeling be fully felt — a Cancer Full Moon will insist on it anyway — and then look honestly at the ledger between your private life and your public one. What culminates here is the truth about that balance, lit brightly enough to finally see.