Neptune’s largest moon, Triton, and the dwarf planet Pluto may have shared a common origin before being separated in the early solar system, an analysis of their composition suggests. Triton and Pluto ...

Take Two translates the day’s headlines for Southern California, making sense of the news and cultural events that affect our lives. Produced by Southern California Public Radio and broadcast from ...

The planet Neptune wobbled in its orbit around the Sun. That could only mean one thing, astronomers said: There was a ninth planet out there, somewhere, lurking in the fringes of the solar system.

After a 10-year-old wrote to NASA begging for Pluto to be re-instated as a planet, Administrator Jared Isaacman appears to be ...