Home > Uncategorized > Comet ISON reaches perihelion

Comet ISON reaches perihelion

An ancient comet that has been moving through the solar system since discovery last year reached perihelion Thursday and observers are speculating that the sun’s heat is breaking it up.

Comet ISON arrived at the point in its orbit closest to the sun at 18:25 UT Thursday (11:25 am MST).

At perihelion the comet is about 730,000 miles from our star. It has brightened considerably as it approached the sun, reaching a magnitude similar to the full moon.

Emily Lakdawalla and Bruce Betts of the Planetary Society are blogging about the event here.

You can see images obtained by NASA’s Solar Dynamics Observatory here.

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