description Abell 63 Overview
Abell 63 is a planetary nebula in the constellation Sagitta. Its central system includes the eclipsing binary star UU Sagittae, whose connection with the nebula was identified in the twentieth century. An eclipsing binary changes in observed brightness when one star passes in front of the other from Earth's viewpoint. Abell 63 is therefore studied both as an expanding ionized nebular shell and as a binary-star system at its center.
help Abell 63 FAQ
What kind of object is Abell 63?
Abell 63 is a planetary nebula in the constellation Sagitta. Its central system includes the eclipsing binary star UU Sagittae.
What is UU Sagittae in relation to Abell 63?
UU Sagittae is the eclipsing binary system at the center of Abell 63. Its connection with the nebula was identified during the twentieth century.
What does eclipsing binary mean in the case of Abell 63?
An eclipsing binary changes in observed brightness when one star passes in front of the other. UU Sagittae is the named binary associated with Abell 63.
Why is UU Sagittae important when studying Abell 63?
The binary gives astronomers a specific central system to associate with the planetary nebula. That relationship, involving UU Sagittae and Abell 63, was identified in the twentieth century.
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