A brief summary of Michael Hopkins' career in the Air Force and at NASA.
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.
Lunar eclipses occur when Earth's shadow blocks the sun. There are three types; the most dramatic is a total lunar eclipse. Find out when the next one will be.
Arecibo Observatory has been used to send a SETI message as well as for scanning the skies for approaching asteroids. It collapsed in 2020.