This was
your sky.
M87's Central Black Hole in Polarized Light
This image shows the intrinsic spin direction, or polarization, of radio waves from the supermassive black hole at the center of elliptical galaxy M87. These radio waves are produced by the powerful magnetic field surrounding the black hole. The data for this image was collected by the Event Horizon Telescope, a global network of radio telescopes, revealing the structure of the black hole's jets.
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In tropical astrology, 31 MAR 2021 falls under Aries (♈). The sign's window runs from 03-21 through 04-19. Aries is the constellation traditionally tied to spring's arrival in the northern hemisphere. The Sun was crossing this region of the sky on 31 MAR 2021.