Video: Gaia's stellar motion for the next 1.6 million years

The stars are constantly moving across the sky. Known as proper motion, this motion is imperceptible to the unaided eye but is being measured with increasing precision by Gaia. This animation shows the proper motions of 40 ...

Ancient artifacts returned to Iran from US university

The Iranian government says that nearly 1,800 ancient artifacts have arrived in Iran as part of the return of thousands of antiquities loaned decades ago to the University of Chicago.

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