The future of a possible "comet of the century" is still uncertain. With just two months to go before Comet ISON skims less than three-quarters of a million miles above the sun's surface, the comet could brighten or fade away.
The future of a possible "comet of the century" is still uncertain. With just two months to go before Comet ISON skims less than three-quarters of a million miles above the sun's surface, the comet could brighten or fade away.