naut - nort
- nautical almanac
- near earth asteroids
- near infrared radiation
- near ultraviolet radiation
- nearby dwarf stars
- nearby galaxies
- nearby stars
- nebulae
- negative H ion
- neighborhood
- Neumann lines
- neutral gases
- neutral hydrogen
- neutrinos
- neutron stars
- neutrons
- new technology telescopes
- Newtonian focus
- Newtonian gravitation
