FRANKFURT, Mar 7: A German travel agency is selling tickets for a flight to give 88 astronomy buffs a close-up view of one of two rare comets expected to pass Earth this year. Eclipse Travel, based in Bonn, has joined charter agency Air Partner and airline Air Berlin to organize flight AB1000 on March 16 as comet Pan-STARRS passes through the solar system, 100 million miles from Earth. (agencies)