O'Reilly logo

Illustrated Guide to Astronomical Wonders by Barbara Fritchman Thompson, Robert Bruce Thompson

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

08Cancer, The Crab

NAME: Cancer (CAN-sur)

SEASON: Winter

CULMINATION: midnight, 30 January

ABBREVIATION: Cnc

GENITIVE: Cancri (CAN-cree)

NEIGHBORS: CMi, Gem, Hya, Leo, Lyn

BINOCULAR OBJECTS: NGC 2632 (M44), NGC 2682 (M67)

URBAN OBJECTS: NGC 2632 (M44), NGC 2682 (M67)

Cancer is a dim winter constellation of medium size, ranking 31st in size among the 88 constellations. It covers 506 square degrees of the celestial sphere, or about 1.2%. Its brightest star is only fourth magnitude, and it has few naked-eye stars. Despite all of this, Cancer is an ancient constellation. In contrast to the 88 modern constellations, which cover the entire celestial sphere, the ancient constellations covered only areas of the sky with bright stars or interesting ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required