Cosmic News

A thrilling landing on Martian ice that was over before it began

There's no such thing as breaking news when it comes to us from space. It's not enough for an event to occur; word of it must then travel to Earth across the vast ocean of the cosmos. The dispatch may move at the speed of light, but the journey can still take hours, years, epochs--turning current events into history long before we ever learn of them. Signals from the Cassini spacecraft, currently studying Saturn's moons, take 84 min. to reach us; the supernova whose cataclysmic birth astronomers observed earlier this year was already fading millions of years ago.

Never was the...

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