28 novembre 2013: al perielio una nuova cometa, più luminosa della luna

La notizia sullo Smithsonioan Magazine del 28 settembre 2012: A Newly Discovered Comet Is Headed Our Way | Surprising Science.

La nuova cometa ICON

The newly discovered Comet ISON is at the crosshairs of this image, taken at the RAS Observatory near Mayhill, New Mexico. Image via E. Guido/G. Sostero/N. Howes / smithsonianmag.com

As of now, Comet ISON, as it’s commonly being called, is roughly 625 million miles away from us and is 100,000 times fainter than the dimmest star that can be seen with the naked eye—it’s only visible using professional-grade telescopes. But as it proceeds through its orbit and reaches its perihelion, its closest point to the sun (a distance of 800,000 miles) on November 28th, 2013, it could be bright enough to be visible in full daylight in the Northern Hemisphere, perhaps even as bright as a full moon.