Earth is an average planet with a diameter of 12,700 km. But a thousand Earths could be stacked on another planet, Jupiter. A thousand Jupiters in the sun. Or the sun could cover one million Earths with a diameter of...
The European Space Agency's spacecraft that carried Philae, the first spacecraft to land on a comet. On March 2, 2004, Rosetta was launched by an Ariane 5 rocket from Kourou, French Guiana, on a 10-year mission to comet 67P/Churyumov-Gerasimenko. Rosetta's...
But let's see how long it has been since our spacecraft reached their destination. Launched on November 3, 1973, Mariner10 took 147 days to reach Mercury on March 29, 1974. But the speed still needs to go down a bit...
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