Loops and Nebulae

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A dark nebula
Lupus 4, a dark nebula (image credit: ESO).

This nebula, named Lynds' Dark Nebula (LDN) 1622 (the 1622 dark nebula catalogued by Beverly T. Lynds), is a dim and dusty cloud of gas. It is approximately 500 light years away (meaning, it takes light about 500 years to travel the distance), and about 10 light-years across (which would be about 10x bigger than our solar system). Lynds' list originally contained 1802 objects she found by visual inspection of the Palomar Observatory Sky Survey (POSS I) catalog. POSS I was a survey that imaged the entire northern portion of the sky in blue and red colours, taken over 1949-1958 at the Palomar Observatory in southern California.

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Loops and Nebulae
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Jesse Rogerson, PhD

As a passionate science communicator, Jesse Rogerson loves promoting science literacy to the public. He frequently represents the Canada Aviation and Space Museum on television and radio, social media, and at conferences. A trained and practicing astrophysicist, Jesse holds a PhD in observational astrophysics from York University, and publishes his research in peer-reviewed journals. Jesse enjoys riding his motorcycle, board games, and ultimate frisbee.