Future of Earth's defense is ground-based planetary radar

Powerful radar systems have played a major role in the study of planets, moons, asteroids, and other objects in our Solar System for several decades, and now have a "unique role" to play in planetary defense—"providing ...

ROSINA spectral measurements bring comet's chemistry to life

Launched March 2004 and following a 10-year journey across the solar system, the European Space Agency's Rosetta probe made history in 2014. It became the first spacecraft to orbit the nucleus of a comet—a frozen remnant ...

Crashing comets may explain mysterious lunar swirls

Brown University researchers have produced new evidence that lunar swirls—wispy bright regions scattered on the moon's surface—were created by several comet collisions over the last 100 million years.

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