The image, captured by the Virtual Telescope Project, showcases a luminous, well-defined ion tail extending from the comet's ...

CC0 Usage Conditions ApplyClick for more information. Where do we come from? How did our planet form? How do we know about the history of our solar system? You can explore these universal questions in ...

Guest: Professor Dagomar Degroot, environmental historian at Georgetown University and author of Ripples on the Cosmic Ocean: ...

Astronomers have long been puzzled by the orbital mechanics of objects that act in strange and largely unexplained ways in the outer reaches of the solar system, beyond the orbit of Neptune.

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain ...

Astronomers say they spotted signs of a giant explosion releasing from a star beyond our solar system, one powerful enough to destroy a planet’s atmosphere.

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There's something big missing from our solar system — and that may be a good thing. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Planetary ...