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Skyward by David H. Levy – August 2023

By David Levy  |  1 Aug 2023  |  Sacred Space Astronomy

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This entry is part 38 of 50 in the series Skyward by David Levy

NGC 663

Introducing Astronomy J. B. Sidgwick. Credit: Hassell Street Press

One of the first astronomy books I ever read was John Benson Sidgwick’s Introducing Astronomy. The book was published in 1959, a year after his death. In it was a large section in which each constellation was introduced, along with interesting things to see in each one. I particularly recall Cassiopeia, in which, between the two fainter stars Delta and Epsilon Cassiopeiae, lies the open cluster NGC 663. I first saw that cluster during the late summer of 1962. All Sidgwick had to say about it was that it can be spotted through binoculars. It didn’t look like much, but I did spot it and then promptly forgot about it for more than sixty years. The other night, while conducting my search for comets, I encountered this star cluster again. This time it was one of the loveliest things I have ever seen. It moved me to tears.

I have since learned that NGC 663 is a grouping of about four hundred mostly big, bright, bluish suns. On a really dark night it might even be visible with the naked eye. An unusual feature is that the cluster happens to be positioned directly in front of a molecular cloud, which somehow blocks the background stars and allows the cluster to be even more beautiful. In a field of view already rich with stars in the Milky Way, the cluster stands out like a heavenly flower filled with diamonds.

I do have more to say about Sidgwick. In my youth I considered him a famous astronomer, but he is known mostly for the few books he wrote, especially Introducing Astronomy. Sidgwick enjoyed wide interests. He loved to hitchhike across the United States and Canada, and he edited a book of the shorter poems of Walter Savage Landor’s shorter poems. Landor, Sidgwick’s subject, had an unusual life, getting expelled both from Rugby School and from Oxford, where he allegedly shot a gun in his dormitory room. Reading about him led me to his delightful poem “The Evening Star:”

Thy star O Venus! often changes
Its radiant seat above,
The chilling pole-star never ranges—
‘Tis thus with Hate and Love.

And ‘tis thus I return to NGC 663, a cluster of stars that warms my heart. Where have I been for the last sixty years, religiously watching the sky, searching successfully for comets, enjoying many faroff stars and galaxies, but largely ignoring one of Nature’s most wondrous splendors?

NGC663. Credit: Dominique and Gerald MacKenzie.

From the Editor: Wanting to see what things would look like from NGC 663, I used the SpaceEngine app to travel to open cluster. I picked a star on the periphery of the cluster, and the first procedurally-generated planet I chose had rings! Bonus! I then angled the shot to show stars from the cluster, and was able to get the Andromeda galaxy, and the PacMan nebula in the shot as well! – Bob Trembley

Hypothetical Exoplanet in NGC 663. Credit: Bob Trembley / SpaceEngine
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