Astronomical Dictionary on Letter #N

Nebula

A term used to describe celestial objects which have a fuzzy, or nebulous, appearance (from the Lati...

Nova

Literally, a new star. An existing star which suddenly increases its brightness by more than 10 magn...

Navka

Arab mother-goddess....

Neptune

Planet eighth in order from the sun. In Roman mythology, god of the sea (Greek name, Poseidon)....

Nucleus

The frozen core of a comet which contains almost the entire cometary mass and is located in the come...