Scientists have recently discovered a unique type of planetary nebula! Conventional planetary nebulae are the remnants of stars that have exhausted their fuel and ejected their outer layers into space. This new phenomenon, dubbed the PM-Variable Nebula, is a type of planetary nebula that has a unique feature - its shape changes over time. This is due to the presence of a binary star system at the nebula’s centre, which has caused the ejected gas to be pushed and pulled in different directions as the two stars orbit each other. This results in a constantly changing shape for the nebula, which is a rare occurrence. Scientists are currently studying this phenomenon and the implications it may have for our understanding of planetary nebulae.

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source: Phys.org