What would happen if th angle of inclination of the earth's polar axis was perpendicular to the plane of the earth's orbit instead of 23.5 degrees from perpendicular?

Answer 1

-- At any point on earth, the days would be the same length all year around.

-- The noon-time sun would be at the same altitude in the sky all year ... directly

overhead on the equator, lower as you move away from the equator.

-- At the poles, the sun would never rise or set, just scoot all the way around

the horizon once a day.

-- There would be no seasonal variation in local climate ... no cold season and

warm season, just minor day-to-day weather changes all year around.

Answer 2

-- There would be no annual variation in local climate, i.e. no 'seasons'.

-- At each place on Earth, the noon altitude of the sun in the sky would be the

same every day of the year ... overhead on the Equator, lower for places farther

from the Equator.

-- Every place on Earth, except the poles, would have 12-hour days and 12-hour nights,

all year around.

-- At the north and south poles, the sun would be exactly on the horizon, going

around and around every day, never rising or setting.

Answer 3

The south pole would be persistently colder but the extent of the cold area of Antarctica would be smaller.

Answer 4

If the incline was less steep, then the earths seasons would be reduced. Steeper, and the earths seasons would be exageratted.

Answer 5

It would mean there were no more seasons. We would have one season (comparatively to spring or fall) all year round.