V/Triangle-shaped, silent craft near Philadelphia on 1/10/21

While stargazing one evening, as I do with family nearly every night, I witnessed a massive V-shaped craft silently traveling north to southwest for roughly 5 seconds.  I cannot gauge how close it was in 1000s/ft but it appeared very large and I cannot express how dead silent it was as it flew past.  I have never seen anything like that before which prompted my searches for similar experiences.
 The V was dark colored with dim running lights along the edges.  Most interesting, in addition to its silence, was that it appeared like light was bending around the body of the V (imagine a triangle shape where the “V” was visible like a silhouette but the stars behind it were visible though stretched/distorted as it flew.  It seemed to appear exactly when near-perpendicular to my vantage point and then it disappeared once at a certain viewing angle.
 No photos were taken as it was a brief moment.