| ephemeris time(noun, expression, study, treatment, science) |
| equinoctial point(noun, expression, study, treatment, science) |
| extragalactic astronomy(noun, expression, form, study, science) |
| extragalactic nebula(noun, expression, study, treatment, science) |
| galactic astronomy(noun, expression, form, study, science) |
| gamma-ray astronomy(noun, expression, form, study, science) |
| high energy astrophysics(noun, expression, form, study, science) |
| hour angle(noun, expression, study, treatment, science) |
| inclination of an orbit(noun, expression, study, treatment, science) |
| inferior conjunction(noun, expression, study, treatment, science) |
| infrared astronomy(noun, expression, form, study, science) |
| interstellar astrophysics(noun, expression, form, study, science) |
| major planet(noun, expression, study, treatment, science) |
| mean solar time(noun, expression, study, treatment, science) |
| mean time(noun, expression, study, treatment, science) |
| neutrino astronomy(noun, expression, form, study, science) |
| observational astronomy(noun, expression, form, study, science) |
| optical astronomy(noun, expression, form, study, science) |
| orbital plane(noun, expression, study, treatment, science) |
| outer planet(noun, expression, study, treatment, science) |