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A dwarf planet out beyond Pluto has been found orbiting our sun — and there may be another planet 10 times the size of Earth.
The sun-grazing comet spent Thanksgiving visiting our neighborhood star, and seems to have emerged from its shadow to tell the tale.
The potential comet of the century grazed the sun last week, and it now appears it didn't survive to put on a once-in-a-lifetime Christmas show for us.
Potential "comet of the century" will be visiting the sun for Thanksgiving Day. There's one last chance to catch this week before it fizzles or makes history.
NASA's Hubble telescope has snapped some of the first pictures in visible light of Comet ISON, which may become one of the brightest we've ever seen from Earth.
Is it hot in here? The Earth is as close to the sun today as it will be all year. Time to break out the sunscreen.