Abell 7
Abell 7 is a faint planetary nebula located 1800 light-years away in the constellation of Lepus. It has a generally spherical shape about 8 light-years in diameter. Within the sphere are complex details that are brought out by narrowband filters. Abell 7 is estimated to be only 20,000 years old, but the central star, a fading white dwarf, is estimated to be some 10 billion years old.
primaryTopic
Abell 7
Abell 7 is a faint planetary nebula located 1800 light-years away in the constellation of Lepus. It has a generally spherical shape about 8 light-years in diameter. Within the sphere are complex details that are brought out by narrowband filters. Abell 7 is estimated to be only 20,000 years old, but the central star, a fading white dwarf, is estimated to be some 10 billion years old.
has abstract
Abell 7 is a faint planetary n ...... be some 10 billion years old.
@en
Wikipage page ID
41,971,081
Wikipage revision ID
741,459,539
appmag v
Integrated: 12.2–14.3; Cental star: 15.4
constellation
date
2013-12-05
names
PK 215-30.1, PN G 215.5-30.8
notes
Simple spherical shape
radius ly
title
Picture of Abell 7
hypernym
type
comment
Abell 7 is a faint planetary n ...... be some 10 billion years old.
@en
label
Abell 7
@en