Blazing exactly like a comet.
Alan C writes:
Comet ISON has started to become visible to the naked eye. Looking like something from Kryton), it’s green in colour (explanation here). And here‘s a great interactive simulation of its path through the solar system (click “Switch to Earth” to see how to view it).
NASA Sees Comet ISON 9 Days Before Close Sun Encounter (Space.com)
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