Guide Star Catalog

Rarity: Common

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At a glance

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Work

Domain

Arts and letters

Knowledge cost

1

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What Wikipedia says

The Guide Star Catalog (GSC), also known as the Hubble Space Telescope, Guide Catalog (HSTGC), is a star catalog compiled to support the Hubble Space Telescope with targeting off-axis stars. GSC-I contained approximately 20,000,000 stars with apparent magnitudes of 6 to 15.

Excerpt from the Wikipedia article “Guide Star Catalog”, under the CC BY-SA 4.0 license. Read the article on Wikipedia