The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The solar system is portrayed as a dynamic, gossip-fueled family, with each planet offering snide comments about one another, ...

The four-planet lineup that began in January concludes by mid- to late February, as Saturn sinks increasingly lower in the ...

Predictions are uncertain, but the solar system may be pushed farther from the galactic core or even ejected entirely from ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.