I was preparing for my early morning class back in January 2025 when I received a notice regarding an asteroid called 2024 ...

Just last week, for instance, the Hayden Planetarium at the American Museum of Natural History (AMNH) in New York City ...

Gaia, Europe’s Milky Way–mapping spacecraft, shut down earlier this year. It was arguably the most important—and most ...

Now that Gaia has gone dark, there’s already talk of what comes next. “Do we really need another astrometry mission?” asks Brown, who first began working on Gaia in 1997.

The Vera C. Rubin Observatory stands atop a mountain peak in Chile, from which its telescope and camera will capture extraordinary information about our universe over the next 10 years as part of the ...

Simultaneous observations at multiple frequency bands have the potential to overcome the fundamental limitation imposed by the atmospheric propagation in mm-VLBI observations. The propagation effects ...

GAIA: At the Frontiers of Astrometry C. Turon, F. Meynadier and F. Arenou (eds) EAS Publications Series, 45 (2010) 365-370ELSA and the Frontiers of AstrometryA.G.A. BrownSterrewacht Leiden, Leiden ...

Europe compares favourably with the US on the level of space science it delivers, and Esa has sometimes “gone boldly” where even Nasa has not. Now that Esa has turned 50 years old, it’s a good time to ...

Given the extreme accuracy reached by future global space astrometry, one needs a global relativistic modeling of observations. A relativistic definition of astrometric observables is then essential ...