Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

A European-Japanese space mission will reach Mercury in 2026, carrying instruments designed to answer a question that has ...

When astronomers first cataloged some of the closest orbiting rocky exoplanets, they wrote them off as bare, airless cinders, ...

Space scientists have spotted a city-sized “butterfly” on Mars. A striking new image from the European Space Agency’s (ESA) ...

Astronomers from the Massachusetts Institute of Technology (MIT) have made an unusual discovery, finding a planet which is in the process of disintegrating. And as it decays, it is leaving behind a ...

When Earth was a molten inferno, water may have been locked safely underground rather than lost to space. Researchers ...

For more than 20 years, the European Space Agency's (ESA) Mars Express orbiter has been imaging the surface of the Red Planet. One region, in particular, continues to fascinate the Mars Express team, ...

"We would have loved to find that Venus was once a planet much closer to our own, so it’s kind of sad in a way to find out that it wasn’t." When you purchase through links on our site, we may earn an ...

New observations suggest that the dwarf planet Makemake is surrounded by faintly glowing methane gas. Scientists are unsure if the gas is contained within a wispy atmosphere or being ejected into ...

Mars changed from a blue world with water to a red desert because its atmosphere escaped into space over billions of years.