Why are they in a line? It's because the solar system is flat. I know, last week I outlined two experiments you can do to prove that the Earth is not flat. But the solar system really is flat.

This happens because the planets in our solar system essentially orbit the sun along the same line across a flat, disc-shaped plane in the sky known as the ecliptic, according to cosmic news site ...

Will there ever be a time when all the planets of our solar system line up in a row, one behind the other, as seen from Earth? (continued) Richard Swifte Darmstadt, Germany.

Such events occur roughly every one to two years, on average. Update: Today's livestream of the solar system planets will now begin at 12:30 p.m. EST (1730 GMT). Take a grand tour of the solar ...

It's possible the edge of the Solar System is farther out still—and might look very different from what we expected. Nature , 2012. DOI: 10.1038/nature11441 ( About DOIs ).

We had our frost line. We knew how solar systems formed. "It was a really beautiful theory," he says. "And, clearly, thoroughly wrong." It is something I find deeply weird.

A snow line has been imaged in a far-off infant solar system for the very first time. The snow line, located in the disc around the Sun-like star TW Hydrae, promises to tell us more about the ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

The Sun accounts for some 99.86% of the mass in our Solar System; of the remaining fraction of a percent, fully two-thirds is embodied in Jupiter, which itself contains more than 70% of the total ...

Reviews Wonders Of The Solar System: The Thin Blue Line review. The BBC's Wonders Of The Solar System continues to soar, as this week Professor Brian Cox told us about the thin blue line.