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Imagine if we put some radio telescopes on Mars and ran a baseline between Mars & Earth.
by jacobush 8y ago
Imagine if we put some radio telescopes on Mars and ran a baseline between Mars & Earth.
- stephengillie 8y agoWe'd get the largest baseline when the Sun is between the planets. This of course blocks interplanetary communication. Another commenter mentions the 0.5 mm precision needed[0] - how would we overcome the communications issue to get an accurate measurement? [0]https://news.ycombinator.com/item?id=17171476 https://news.ycombinator.com/item?id=17171476
- NeutronStar 8y agoHow long of a time would the Sun be blocking the Earth from Mars?
- lainga 8y agoI imagine the same way the article's array does: with an (interplanetary) version of sneakernet [0], taking independent measurements which are then delivered to be correlated in one place. I think you could keep atomic clocks on Mars and Earth in sync with extremely accurate calculation of the Earth-Mars distance at any time, and thus the propagation delay between them. EDIT: only one star!! [0] https://en.wikipedia.org/wiki/Event_Horizon_Telescope#/media/File:EHT-infography.jpg https://en.wikipedia.org/wiki/Event_Horizon_Telescope#/media...