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Beyond Gaia: A Deep-Space Astrometric Mission To Obtain ~1% Parallax Distances at 10 kiloparsecs

The [Gaia space telescope](https://arxiv.org/abs/1609.04153) is currently measuring parallax distances for Galactic stars with ~1% precision out to ~1kpc. This will be a revolutionary data set, but order-of-magnitude improvements are possible with a next-generation mission that is already achiev...

By Khee-Gan Lee