Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

Mercury is tiny, barely bigger than the Moon. Its metallic core makes up 70% of the planet’s mass, vastly exceeding Earth’s 32% and Mars ’ 25%. It’s unlikely that the core actually formed like this.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

A study led by Howard Chen looks to explain what NASA space telescopes are missing in the search for life beyond Earth.

A recent theory has emerged suggesting that the answer to Mercury’s unusually large metallic core may lie in the early history of our solar system. This theory proposes that a soft collision between ...

On October 6 1995, at a scientific meeting in Florence, Italy, two Swiss astronomers made an announcement that would transform our understanding of the universe beyond our solar system. Michel Mayor ...

NASA has gone silent just hours before humans get their most detailed look at the mysterious object traveling through the ...

JWST's detection of phosphine on a brown dwarf, also known as a "failed star," could have repercussions for the claimed detection of the molecule on Venus.

Forty-three years ago, in March 1982, humanity received its last direct visual postcard from the surface of Venus.

A detection of phosphine in the atmosphere of a brown dwarf 54 light-years from Earth deepens the mystery of phosphorus chemistry throughout the Milky Way.

A recent analysis of lunar samples reveals profound differences between its two sides, suggesting that the Moon's interior is not as uniform as previously thought. The Chinese Chang'e 6 mission ...

The Nobel Prize is considered the "Mount Everest of science." But it faces criticism over how winners are chosen, and may ...