This was
your sky.
M51: The Whirlpool Galaxy
To find M51, the Whirlpool Galaxy, locate the Big Dipper, then follow its handle away from the bowl to the last bright star. Slide your telescope slightly south and west to find this stunning pair of interacting galaxies, the 51st entry in Charles Messier's catalog. The larger galaxy, NGC 5194, has well-defined spiral arms and dust lanes that clearly sweep in front of its companion, NGC 5195. This galaxy is perhaps the original spiral nebula observed.
We cannot put this date's photograph on paper at poster size. We can print the nearest public archive plate to your date instead.
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In tropical astrology, 2 SEP 2021 falls under Virgo (♍). The sign's window runs from 08-23 through 09-22. Virgo is the largest zodiac constellation, holding the heart of the Virgo galaxy cluster. The Sun was crossing this region of the sky on 2 SEP 2021.