The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a ...

The answers to those questions depend on how we define the death of the solar system.

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away ...

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our understanding of how planets take shape — not only in our solar system, but ...

The photos reveal a bright and well-developed coma, the cloud of gas and dust surrounding the comet's nucleus, with striking ...

Typically, telescopes are synonymous with bringing far-off objects close, but the newest member of the solar system was ...

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