Since then we've been teased and then disappointed a few times. Back in 2004 I looked forward eagerly to seeing two fuzzy iceballs by eye at the same time — a visual treat not achieved since 1911. But comets NEAT and LINEAR failed to live up to their advance billing. Comet Elenin (C/2010 X1), discovered last year, likewise might not perform as well as hoped when it peaks this coming September.
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