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Lines in the spectrum regularly shifted back and forth, suggesting the star was being tugged by an orbiting companion, Doppler shifting the light.

Their Earthcare satellite used a Doppler radar to capture the view.

It also carries the first space-based Doppler radar to track the motions of clouds and probe how they fuel storms.

Operating in an era before Doppler radar and high-speed super computers, Allied meteorologists had to rely on hand-drawn maps, historical data, and spotty weather observations to put together their forecasts.

The wearable ultrasound patch marks a significant leap from the current clinical standard, called transcranial Doppler ultrasound.