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653 results

653 results

The Black Hole Explorer: operating a hybrid observatory

Conference Paper

We present a baseline science operations plan for the Black Hole Explorer (BHEX), a space mission concept aiming to confirm the existence of the predicted sharp “photon ring” resulting from strongly lensed photon trajectories around black holes, as...

The Black Hole Explorer (BHEX) cryocooling instrument

Conference Paper

The Black Hole Explorer (BHEX) is a space-VLBI mission that will extend the Event Horizon Telescope into space. The cryogenic receivers must be cooled down to 4.5K. A cryogenic system consisting of two Stirling cryocoolers and a Joule-Thomson cooler has...

Contested Visibilities of the Anthropocene (Keynote)

Presentation

Our current climate condition sets us in a great conundrum. On the one side, ocean rise, desertification, and extreme weather events are upending the well-being and economic fortunes of millions. On the other side, we have few means to convey the causes ...

Time: Physics, Film, History

Presentation
Henri Poincaré's and Albert Einstein's reformulation of simultaneity was long seen as a development from imaginative thought experiments. But the all-too-material and the most abstract notions of time cross in essential ways (Swiss Patent Office, Paris...