For many people, the definition of a planet was only made clear in 2006, when the spunky world Pluto was demoted from a planet to a dwarf planet. Now, a team of astronomers is pushing for “planet” ...

But now, as astronomers find more and more exoplanets, the definition of habitable has become more nuanced. Scientists often refer to an optimistic habitable zone and a conservative habitable zone.

A study extends the definition of a habitable zone for planets to include their star's magnetic field. Interest in Earth-like planets orbiting within the habitable zone of their host stars has surged, ...

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but are unlike any in our own solar system. The two exoplanets, or planets outside of our solar ...

Using HARPS and HARPS-N spectrographs, astronomers have observed a nearby K-type star designated HD 176986, known to host two super-Earth exoplanets. The observations resulted in the discovery of ...

NASA has officially tracked 6,000 confirmed exoplanets—planets outside our solar system—a milestone that reflects decades of cumulative discoveries and ongoing research efforts. This achievement, ...

Science is driven by our desire to understand things. In some cases, where it requires significant effort and investment to develop systems that can understand new things, science benefits from a game ...

Tau Ceti is the star system of choice for Marathon, Project Hail Mary, and Directive 8020, among others. Here's why.

In our solar system, objects are close enough that we can check the orbit and see if has been cleared of other objects. This is problematic if we can only infer rough properties of what could be a ...

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system. The most likely reason (when combined with other observation) for seeing 1000 times more of ...