If there is a black hole, it's at least 20 times farther from Earth than the furthest planet, Neptune, in a distant region of our solar system called the extended Kuiper Belt. The belt is home to ...

Staring at the sun—a close (but safe) look at our home star Staring at the sun ... Free learning activities and videos about the solar system Free learning activities and videos about the ...

Solar panels are gaining popularity as a home energy source ... which means that it won't be part of any rooftop solar system you might be installing right now. It's also worth noting that ...