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

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 ...

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

When we have five or more planets filing into a small sky area, an alignment is upgraded to parade status. Parade is not an ...

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

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it ...

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

Every Planet of Our Solar System Is Lining up in the February Night Sky NEW YORK (AP) — Seven planets grace the sky at the end of February in what's known as a planetary parade, though some will ...

The Milky Way's tidal forces may be shaping the Oort Cloud's inner structure into a spiral shape.

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