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Measuring radio leaks from 36,000 kilometers up

Radio astronomy has a pollution problem. Satellites thousands of kilometers overhead, designed to broadcast communications or relay data, are increasingly contaminating the frequencies astronomers use to study the universe. While much attention has focused on...

Clues to the origin of hot Jupiters hidden in their orbits

The first exoplanet ever discovered in 1995 was what we now call a “hot Jupiter,” a planet as massive as Jupiter with an orbital period of just a few days. Today, hot Jupiters are thought to have formed far from their stars—similar to Jupiter in our solar...