Oephaird CF-A e7699 is a planetary nebula of an extremely rare kind: it houses an Earth-like world, about 2,500 light-seconds from the supernova remnant at the center of the system. It orbits a planet as its moon, and out of the 38 known examples of Earth-like worlds inside planetary nebulae, only three are moons, including this one. (As of 3310. Nov.)

The stellar remnant is a neutron star (of 2.2 Solar Masses) with an age of about 280 million years. Three bodies orbit the star, only one of which is what a visitor might expect: a scorched world with a surface temperature of about 1,600 °C and a crushingly dense atmosphere that's made of silicate vapour.

Orbiting this low-albedo world is a pristine Earth-like world (1 a), of the low-pressure-and-low-gravity type. (0.45 atm and 0.63 g.) The average surface temperature on this moon is a relatively balmy 5 °C.

What might lead to the development of an Earth-like climate only a few hundred million years after the violent death of its parent star is a mystery with few explanations. Hypotheses range from being a captured moon that had simple life before it was originally ejected, to a panspermic spread of terraforming bacteria, but insufficient evidence exists to form a definitive conclusion.

The final world in the system is a water world with a thick atmosphere and gravity that's about three times Earth-normal.

There are no landable worlds in the nebula itself. However, the galactic neighborhood is densely populated, and the nebula dominates the view from nearby Oephaird CF-A e8085, where travelers can find roseum bioluminescent anemonae growing on the ringed body 6.