The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago. In 1983 ...

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.

Most have been found via microlensing: their gravity acts as a lens that boosts the light of a background star in a ...

Ancient depictions of the Egyptian sky goddess may represent one of the earliest visual interpretations of the Milky Way ...

A surprisingly well-formed spiral galaxy has been spotted just a billion years after the Big Bang, challenging long-held ...

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 ...

An interest in understanding the role that the Milky Way played in Egyptian culture and religion has led University of ...

The cloud, named Eos, is chock-full of molecular hydrogen and possibly rife with star-forming potential in the future.

None? One? Four? We’ll likely never know; our solar system’s 4.6-billion-year history offers a long time for shedding worlds into the Milky Way. But there very well could be galactic nomads ...