Astronomers Use Black Holes to Pinpoint Earth's Location. But are Phones and Wifi Blocking the View?


Measuring earth's position (or "geodesy") requires using telescopes that track radiation from distant black holes. Their signals "pass cleanly through the atmosphere and we can receive them during da… [+2152 chars] Show more...

Measuring earth's position (or "geodesy") requires using telescopes that track radiation from distant black holes. Their signals "pass cleanly through the atmosphere and we can receive them during day and night and in all weather conditions," writes a senior …

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