Comet ISON's sweep past the Sun

NASA / ESA / SOHO Consortium

Latest Updates on Comet ISON

November 29, 2013                                                                  | Researchers are still trying to sort out how much of Comet ISON survived its close passage around the Sun. The comet’s head dwindled out, but after perihelion a headless ghost of the comet continued on its way, even seeming to brighten. > read more

Comet ISON Becomes a Nail-Biter

November 25, 2013                                                                | Is the comet dying, just three days before its closest pass by the Sun? There are signs that its nucleus has stopped producing anything. > read more

Can You Spot Comet ISON at Perihelion?

November 22, 2013                                                                | It won’t be easy by a long shot, but it just might be possible to spot the comet in broad daylight as it passes nearest the Sun. > read more

Tour December’s Sky by Eye and Ear!

October 27, 2013                                                                  | December’s crystal-clear skies offer Venus low in the west after sunset, a “tower of brilliance” (including Jupiter) rising in the east, and the prospect of a nice showing by Comet ISON in the predawn sky early in the month. > read more


Black hole binary

Jingchuan Yu

Downsizing a Black Hole

November 27, 2013                                                                | Astronomers have revealed a supposedly monster black hole to be rather ordinary in size. > read more

Oddball Pulsar Origin?

November 26, 2013                                                                | A few whirling neutron stars might get their start as very different objects, at least if a new analysis is correct.  > read more


Comet ISON Photo Contest

Announcing the Comet ISON Photo Contest

October 24, 2013                                                                | Sky & Telescope is now accepting submissions to the Comet ISON Photo Contest! > read more

This Week’s Sky at a Glance

Dawn view, Dec. 3. Use Saturn and Mercury to find the right spot to examine with binoculars. Good luck.

This Week’s Sky at a Glance

November 27, 2013                                                                  | After swinging through perihelion on November 28th, what’s left of Comet ISON may emerge into the dawn sky as previously scheduled. Meanwhile, the rest of the heavens continue going about business of their own. > read more

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