Because the autumnal equinox has now passed, the earth is beginning to tilt so that the Northern Hemisphere is away from the sun and the Southern Hemisphere is closer to the sun.
(the autumnal equinox; has passed; T:now) (the earth; is beginning; ) (the earth; to tilt; so that the Northern Hemisphere is away from the sun and the Southern Hemisphere is closer to the sun) (the Northern Hemisphere; is; away from the sun) (the Southern Hemisphere; is; closer to the sun) (the Southern Hemisphere; is closer to; the sun)
the autumnal equinox the earth the earth the Northern Hemisphere the Southern Hemisphere the Southern Hemisphere
has passed is beginning to tilt is is is closer to
T:now
so that the Northern Hemisphere is away from the sun and the Southern Hemisphere is closer to the sun
away from the sun
closer to the sun
the sun