We recall that Copernicus speculated that the earth's axis is tilted from the perpendicular to its orbit around the sun by 23.5 o , which, he claimed, accounted for the seasons (When the earth is tilted with its north pole toward the sun in our summer, the amount of energy received per square metre of ground in Baltimore is about double what it is when the north pole is tilted away from the sun in the winter.
(the earth; is tilted; with its north pole toward the sun in our summer) (energy; received; per square metre of ground in Baltimore) (the north pole; is tilted; away from the sun; T:in the winter) (the amount of energy; is; about double what it is) Context(the amount of energy is,List([253, 325))):(We; recall; that Copernicus speculated that the earth's axis is tilted from the perpendicular to its orbit around the sun by 23.5 o) Context(We recall the amount of energy is,List([0, 325))):(that Copernicus; speculated; that the earth's axis is tilted from the perpendicular to its orbit around the sun by 23.5 o) Context(We recall that Copernicus speculated the amount of energy is,List([0, 325))):(the earth's axis; is tilted; to its orbit around the sun; by 23.5 o) (he; claimed; accounted for the seasons) (it; is; T:when the north pole is tilted away from the sun in the winter) (23.5 o; accounted; for the seasons)
the amount of energy is,List([253, 325)) We recall the amount of energy is,List([0, 325)) We recall that Copernicus speculated the amount of energy is,List([0, 325))
the earth energy the north pole the amount of energy We that Copernicus the earth's axis he it 23.5 o
is tilted received is tilted is recall speculated is tilted claimed is accounted
with its north pole toward the sun in our summer
per square metre of ground in Baltimore
away from the sun T:in the winter
about double what it is
that Copernicus speculated that the earth's axis is tilted from the perpendicular to its orbit around the sun by 23.5 o
that the earth's axis is tilted from the perpendicular to its orbit around the sun by 23.5 o
to its orbit around the sun by 23.5 o
accounted for the seasons
T:when the north pole is tilted away from the sun in the winter
for the seasons