exactly a year
revolution
The period of revolution of the Earth is 365.2564 days.
The period of the Earth's revolution around the Sun, 365.2422 days
The planet Mercury completes one orbital revolution around the sun in 88 earth days.
The eccentricity of the Earth's orbit is currently about 0.0167; that rounds to zero.
A year.
Seasons
we call it revolution.
the revolution of earth around the sun
REVOLUTION
Gravity.
Orbit
1' degree per day
the heliocentric system and the geocentric system
Earths tilted axis and its revolution around the sun
Yes.
Ecliptic.