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| Tom and Jennifer Polakis | profile | all galleries >> Time-lapse Animations >> Deep Sky >> Expanding Planetary Nebulae | tree view | thumbnails | slideshow |
 NGC 7293 -- 1914 - 2015 |
 Dumbbell Nebula -- 120 years |
 Jones-Emberson 1 -- 1954 - 2019 |
 NGC 7008 -- 1914 - 2019 |
 NGC 7009 -- 1914 - 2019 |
 M57 -- 1899 - 2015 |
 M97 -- 1899 - 2020 |
 NGC1501 -- 1914 - 2019 |
 NGC 246 -- 1954 - 2019 |
 NGC 7662 -- 1899 - 2019 |
 Sh 2-71 -- 1988 - 2023 |
 Simeis 22 -- 1954 - 2023 |
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