Comets
Facts about and images of comets, the rocky, icy celestial bodies that orbit the Sun and can sometimes briefly be seen with the naked eye in the night sky above Earth
Gallery | Comet C/2011 L4 PANSTARRS
Facts about and images of Comet C/2011 L4 PANSTARRS.
Gallery | Comet C/2012 S1 ISON
Facts about and images of Comet C/2012 S1 ISON.
Gallery | Comet C/2013 X1 PANSTARRS
Facts about and images of Comet C/2013 X1 PANSTARRS.
Gallery | Comet C/2013 US10 Catalina
Facts about and images of Comet C/2013 US10 Catalina.
Gallery | Comet C/2014 Q2 Lovejoy
Facts about and images of Comet C/2014 Q2 Lovejoy.
Gallery | Comet C/2017 O1 ASASSN
Photographs and a report of how Comet C/2017 O1 ASASSN appeared and changed over time.
Gallery | Comet C/2015 V2 Johnson
A guide to Comet C/2015 V2 Johnson and pictures of the celestial body.
Gallery | Comet C/2014 E2 Jacques
A guide to Comet C/2014 E2 Jacques and pictures of the long-period celestial body.
Gallery | Short-period comets
What is a short-period comet, and how long do they take to orbit the Sun?