Thousands of years ago, Chinese astronomers used an ancient record of constellations and their ... would be considered the world's oldest star chart. Researchers at the National Astronomical ...

A new preprint suggests that an ancient Chinese star catalog dates to 355 B.C.E. But other researchers aren't convinced, ...

By the latter half of the 19th century, star charts and atlases featured loosely fabricated patchworks of constellations with arbitrary boundaries of varying shapes and sizes. Many included ...

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Scientists can date star charts because, from Earth's perspective, constellations appear to drift over hundreds of years because of the wobble in our planet's axis. Stars also have their own ...

We sell different types of products and services to both investment professionals and individual investors. These products and services are usually sold through license agreements or subscriptions ...