Second Mission: International Cometary Explorer
On June 10, 1982, after completing its original mission, ISEE-3 was repurposed. It was renamed the International Cometary Explorer (ICE). The primary scientific objective of ICE was to study the interaction between the solar wind and a cometary atmosphere. After a successful thruster burn to knock it loose from its halo orbit on September 1 of that year, it used the instability of the Earth/Moon and Earth/Sun Lagrange points, making a series of lunar orbits over the next 15 months. Its last and closest pass over the Moon, on December 22, 1983, was a mere 119.4 km above the moon's surface. By the beginning of 1984, ICE was in heliocentric orbit.
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Famous quotes containing the word explorer:
“Well, Philippe, he died because of his work. He was like an—like an explorer in a wild country where no one had ever been before. He was searching for the truth, he almost found a great truth, but for one instant he was careless.”
—James Clavell (b. 1924)