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The sun unleashed a powerful X-class solar flare on Friday (Feb. 9), peaking at 8:10 a.m. (1310 GMT) and triggering shortwave radio blackouts across South America, Africa and the Southern Atlantic.

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...