Astronomy information e.g.

Astronomy

Astronomy > O

The following astronomy terms start with o.

O-type asteroid

Oberon (moon)

Oblateness

Obruchev (crater)

Observation

Observatory

Occultation

Oceanus Procellarum

Octans

Odysseus crater

OGS Telescope

OH maser

Olbers' paradox

Ole Rømer

Oliver Heaviside

Olympus Mons

Omar Khayyám

Omega Centauri

Omniverse

One-Mile Telescope

Oort cloud

Oort, Jan

Ooty Radio Telescope

Open cluster

Ophelia (moon)

Ophiuchus

Optical astronomy

Optical axis

Optical binary

Optical depth

Optical double

Optical telescope

Optical window

Orbit

Orbital elements

Orbital period

Orbital resonance

Orbital revolution

Orbital speed

Origin of life

Orion

Orion Nebula

Orrery

Oscillatory universe

Outer Rook Mountains

Outer space

Owl Nebula

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