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In June 1985 the Soviet Union did something that still sounds impossible: it flew two balloons through the clouds of another planet. Released into...
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In June 1985 the Soviet Union did something that still sounds impossible: it flew two balloons through the clouds of another planet. Released into...
She was told women could not be scientists. She became NASA's first Chief of Astronomy and the "Mother of Hubble." On August 30, NASA...
Once every 176 years, the four giant planets line up so a single spacecraft can slingshot from one to the next in a single...
Galileo was deliberately crashed into Jupiter. Cassini into Saturn. Both destroyed at the height of their success to protect the ocean moons they had...
It weighed barely 570 pounds and ran on plutonium. Its electronics were 1970s vintage. And in September 1979, after six years and billions of...
In October 1967 the Soviet Union announced that Venera 4 had landed on Venus. It hadn't — the probe was crushed 17 miles up,...
The Soviet Union built armored titanium tanks to survive Venus. The United States never built a lander at all. Every American Venus probe was...
A comet that may be older than the Sun itself just passed through our Solar System — only the third visitor ever confirmed to...
The fastest object humanity has ever built, moving at 430,000 miles per hour. A region of space millions of degrees hot. A 4.5-inch slab...
The fastest spacecraft ever launched. A nine-year journey across three billion miles. A world that, for 85 years, had been almost nothing but a...