Using a NASA supercomputer to run models, researchers led by SwRI astronomer David Nesvorny now believe that the Inner Oort cloud looks like a spiral disk, around 0.24 light-years across, with two ...

The solar system could be packed with 1 million alien visitors, space rocks shaken away from our cosmic neighbor Alpha ...

"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." Spirals are a repeating theme in ...

Astronomers believe they've discovered a spiral structure inside the Oort cloud that surrounds our solar system.

Mercury, Venus, Mars, Jupiter, Saturn, Neptune and Uranus could be visible, but not all can be seen by the naked eye.

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long ...

which ebbs and flows as our solar system ambles through the Milky Way. (For objects near the Sun, like planets, the tide's effect is largely overpowered by the star's gravity.) This is what the ...

Let’s get this out of the way—any scientist studying Uranus will tell you that they’re tired of the planet being the butt of ...

Here are three myths about the appearance of the planets in the night sky — and how to set your expectations to get the most ...

The Oort cloud is a shell of icy objects that forms the very outskirts of our Solar System. Recently, a group of researchers discovered that the inner portion of the Oort cloud likely has spiral ...