We refer to our own solar system as the solar system ... is difficult. The Milky Way might be relatively small compared to other galaxies, but it's still an immense collection of stars.

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class of planets.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Earth" planet was discovered by researchers. It is not believed these planets are more common than previously thought.

Those "arms" resemble the elongated structures of a spiral galaxy, like our very own Milky Way. At an epic timescale "comparable to the age of the solar system," which is 4.6 billion years old ...

Stargazers accustomed to scanning the Milky Way galaxy may notice something odd overhead this month: barely any milk in that way.