A complex form of carbon crucial for life on Earth has been spotted outside the solar system for the first time. Its presence helps show how the compounds needed for life could come from space. The ...

Astronomers have found a compact solar system whose planets line up in a way that, according to current models, should not be possible. Around the small star LHS 1903, a dense rocky world orbits on ...

Active small bodies—including comets, active asteroids, icy minor planets, and transitional objects—occupy a unique position in planetary science. As ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously unknown world may be lurking in the outer reaches of the solar system. The ...

The Radcliffe wave. The clouds that comprise this structure are highlighted in red and superimposed on an artist's illustration of the Milky Way. The location of the sun is highlighted by the yellow ...