There used to be nine planets. Now there are eight, or maybe there are nine after all. Whichever you prefer, here is a list of them in the order they appear in the solar system.
What's the weather like on other worlds? Expect methane rain, global haboobs and a 10,000-mile-wide hurricane.
A biography of Soichi Noguchi, JAXA astronaut and only non-American so far to fly in the space shuttle, the Soyuz and SpaceX Crew Dragon.
The next era of our investigation of the cosmos is about to be kick-started by the Rubin Observatory, which is currently under construction in northern Chile.
Leading scientists have long pondered how matter gives rise to our subjective experience of reality and believe consciousness could even permeate space and time.
The European Space Agency’s Space Situational Awareness program is tackling the problem on three fronts.
Gagarin became the first of humankind to blast off into space on April 12, 1961, but rumors continue to circulate that another cosmonaut had beaten him to the punch days before.
NASA's Perseverance rover isn't just exploring the Red Planet. The life-hunting robot will also help a little bit of Mars make it to Earth a decade or so from now, if all goes according to plan.
A concentration of plasma in the Earth's atmosphere, called the ionosphere, interacts with solar winds, ultraviolet radiation and radio waves.
Tianwen-1 is the ambitious first independent interplanetary mission from China, now in orbit around Mars.
According to the New Testament, the Star of Bethlehem led the three wise men to Jesus' birth. Here are a few theories about what the star really was.