While planets cannot actually fully line up in the 3D solar system, it will appear from human perspective as an alignment.

Astronomers for the first time have deciphered the three-dimensional structure of the atmosphere of a planet beyond our solar system, revealing three layers like a wedding cake on a ferociously ...

This conjunction Friday morning might look like a smiley face to some, but it does give us an accurate 3D view of our solar system.

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same time, challenging current models of our solar system’s evolution.

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