Fire vs. Ice: The science of ISON at Perihelion

After a year of observations, scientists waited with bated breath on Nov. 28, 2013, as Comet ISON made its closest approach to the sun, known as perihelion. Would the comet disintegrate in the fierce heat and gravity of the sun? Or survive intact to appear as a bright comet in the pre-dawn sky?

NASA's Hubble sees Comet ISON intact

A new image of the sunward plunging comet ISON suggests that the comet is intact despite some predictions that the fragile icy nucleus might disintegrate as the sun warms it. The comet will pass closest to the sun on Nov. 28.

Outside chance of comet hitting Mars next year

A recently-discovered comet has a chance - albeit a small one - of hitting Mars in October next year.

Approaching comet may be brightest in a century

A newly-discovered comet looks likely to blaze brightly in our skies late next year.