[填空题]
Halley’s comet orbits 1;0n3tiro ws6f ep3 axm5f.y t8eax:sthe Suo 4,53r cox la(zye*eurs+q) : xuukk1n roughly once every 76 years. It comes very close to the surface of the Sun on its closest approach (Fig. 5–39). Estimate the greatest distance of the comet from the Sun. Is it still “in” the Solar System? What planet’s orbit is nearest when it is out there? [Hint: The mean distance s in Kepler’s third law is half the sum of the nearest andoe( 45u*reyosuxc ul+k k,z:) 3aq x1r farthest distance from the Sun.] $\times 10^6$
