The size of the solar system is defined by the volume of space over which the Sun’s influence exceeds those of other nearby stars in the Milky Way galaxy. This influence derives from two fundamental ...

And the earth was without form and void, and darkness was upon the face of the deep. Sometimes, if the night is dark and clear enough, you can look up and see the Milky Way in its arc across the sky.

Learn how to size charge controllers, inverters, and solar panels already on hand with a goal of future expansion. Welcome to our series answering reader questions and concerns about how to cut the ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now. Twice as large, in fact. To put that into context, those ...

Researchers have located "the perfect solar system", forged without the violent collisions that made our own a hotchpotch of different-sized planets. The system, 100 light years away, has six planets, ...

If you look up on a clear night, the brightest and largest object in the sky will probably be the moon. And unless you have a decent telescope, it is the only natural satellite you can see with your ...

It's possibly as big as Manhattan, likely older than our own solar system, and it's traveling through space at speeds of up ...