Find the length of the major axis of​ earth's orbit using​ kepler's third law and the fact that​ earth's orbital period is 365.256 days. use gequals

Kepler's Third Law:

P² = a³

P is a period of the orbit (in years) so 365.256 days = 1 year,

a is a semi major axis.

1² = a³

a = 1 AU (astronomical unit) = 149,597,870.7 km

Major axis = 149,597,870.7 km · 2 = 299,195,741.4 km