| ultraviolet astronomy(noun, expression, form, study, science) |
| vernal equinox(noun, expression, study, treatment, science) |
| x-ray astronomy(noun, expression, form, study, science) |
| zodiac(noun, name, science, knowledge, space) |
| accretion(noun, study, treatment, science, knowledge) |
| alignment(noun, study, treatment, science, knowledge) |
| anomaly(noun, study, treatment, science, knowledge) |
| apoapsis(noun, study, treatment, science, knowledge) |
| archaeoastronomy(noun, form, study, science, field) |
| ascension(noun, study, treatment, science, knowledge) |
| astrobiology(noun, form, study, science, field) |
| barycenter(noun, study, treatment, science, knowledge) |
| canal(noun, study, treatment, science, knowledge) |
| coma(noun, study, treatment, science, knowledge) |
| conjunction(noun, study, knowledge, treatment, science) |
| culmination(noun, study, treatment, science, knowledge) |
| declination(noun, study, treatment, science, knowledge) |
| egress(noun, study, treatment, science, knowledge) |
| emersion(noun, study, treatment, science, knowledge) |
| epoch(noun, study, treatment, science, knowledge) |