NASA. The Cat's Eye nebula is surrounded by an enormous but - Lot 276

Lot 276
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NASA. The Cat's Eye nebula is surrounded by an enormous but - Lot 276
NASA. The Cat's Eye nebula is surrounded by an enormous but extremely tenuous halo of gaseous material, more than three light-years across. In recent years, it has been discovered that some planetary nebulae possess halos like this one, probably formed from material ejected during earlier active episodes in the star's evolution, probably between 50,000 and 90,000 years ago. Period chromogenic print. Label on back. 25 x 20CM with margins.
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