Comet Ison

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  Using Google to find time travellers

  Robert Nemiroff and his students were inspired to conduct the research after they wondered: If there were time travellers among us, would they be on social media?

• 'Zombie' comet ISON may be back from the dead

  A smaller, paler version of Comet ISON may have survived incineration in the sun's corona and may be brightening, scientists said on Friday.

• Comet ISON vanishes as it circles the sun

  Comet ISON appears to have flown too close to the surface of the sun on Thursday and vanished as it circled the fiery surface.

• If comet survives sun's heat, you can see it

  A comet that left the outer edge of the solar system more than 5.5 million years ago will pass close by the sun on Thursday, becoming visible in Earth's skies in the next week or two - if it survives.

• Comet may be visible from Earth if it survives sun's heat, gravity

  A comet that left the outer edge of the solar system more than 5.5 million years ago will pass close by the sun on Thursday, becoming visible in Earth's skies in the next week or two - if it survives.

• Will comet ISON survive its near brush with the Sun?

  US astrophysicists are split over what will happen when the comet ISON passes near the sun Thursday, but a majority think it will break apart.

• Incoming comet ISON heading for close encounter with sun

  A comet is heading for a close encounter with the sun later this month, and if it is not vaporized or torn apart, it should be visible to the naked eye in December.

• Is the 'Christmas Comet' cracking up?

  An incoming comet that skygazers had hoped would provide one of the greatest celestial shows of the century, could be a fizzle.

• Dazzling comet ISON may be dying

  Comet ISON - predicted to be one of the brightest comets of the century - may actually be disintegrating, according to a new study.

• 'Comet of the Century' already may have fizzled out

  Astronomers slated to meet this week to discuss observing plans for Comet ISON may not have much to talk about. The so-called "Comet of the Century" may already have fizzled out.

• Comet shining 15 times brighter than moon will fly by Earth

  A comet which shines 15 times brighter than the moon and potentially visible in broad daylight will fly by the Earth next year, giving humans a chance to witness one of the most spectacular events.