description Abell 70 Overview
Abell 70 (also known as PN A66 70) is a planetary nebula located in the constellation Aquila. It is notable for the presence of a background galaxy that appears superimposed on its rim, creating a distinctive diamond-shaped appearance in telescope images. The nebula contains a binary central star system in which the primary component is a barium star—a type of star with an overabundance of barium and other heavy elements. This stellar configuration makes Abell 70 an important object for studying binary star evolution and the influence of companions on the chemical composition of stellar atmospheres.
help Abell 70 FAQ
What is Abell 70?
Abell 70, also cataloged as PN A66 70, is a planetary nebula in the constellation Aquila. It formed from the expelled outer layers of an evolved star rather than from a supernova.
Why does Abell 70 look like a diamond ring?
A background galaxy appears superimposed on the rim of the nebula in telescope images. The alignment creates the distinctive diamond-ring or diamond-shaped appearance, even though the galaxy is far behind the nebula.
What is the galaxy behind Abell 70 called?
The background galaxy is commonly identified as PMN J2033-0656. Its apparent position on Abell 70's edge is a line-of-sight coincidence, not a physical connection.
Is Abell 70 a galaxy or a planetary nebula?
Abell 70 is a planetary nebula, despite the galaxy visible behind its rim. The word planetary refers to its historical telescope appearance and does not mean that it is made of planets.
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