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Hoag's Object by NASA: This non-typical galaxy is known as a ring galaxy, and was discovered in 1950 by astronomer Art Hoag, who initially thought it to be a planetary nebula. Serendipitously, from…
Cat's Eye Nebula Hoag's Object by NASA: This non-typical galaxy is known as a ring galaxy, and was discovered in 1950 by astronomer Art Ho...
