1. Between or among stars
   "the density of hydrogen in interplanetary and interstellar space"

See also: star

Encyclopedia: Interstellar

• Helianthemum scoparium
• helianthus
• Helianthus angustifolius
• Helianthus annuus
• Helianthus giganteus
• Helianthus laetiflorus
• Helianthus maximilianii
• Helianthus petiolaris
• Helianthus tuberosus
• helical
• Helichrysum
• Helichrysum bracteatum
• Helichrysum secundiflorum
• Helicidae
• helicoid
• helicon
• helicopter
• helicopter view
• Helicteres
• Helicteres isora
• helio-
• Heliobacter
• Heliobacter pylori
• heliocentric
• heliocentric parallax