Here's a guide to all the rocket launches and astronomical events in 2021, as well as milestones for space missions, anniversaries and conferences.
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.
Find out what's up in your night sky during April 2021 and how to see it in this Space.com stargazing guide.
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.
On Dec. 14, a total solar eclipse will be visible from South America. It will be the first and only total solar eclipse of 2020. Here's everything you need to know.