A "solar fireworks show" lit up the solar system just in time for the United States' 250th birthday. The sun emitted a strong solar flare on Saturday, which peaked at around 4:41 p.m. ET, NASA said.

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Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published in the journal Icarus, this extra world might have triggered a violent ...

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