Astronomers have discovered that "super-Earth" planets may exist on wider orbits than previously thought — and this implies these rocky, or "terrestrial," worlds are far more common than was suspected ...

The president’s proposed budget includes major cuts to NASA — among them, the elimination of funding for the Nancy Grace ...

Plato, the European Space Agency's terrestrial planet hunter spacecraft, is seen after having 24 of its 26 cameras installed.

Comets that have hit Earth have been a mixed bag. Early in Earth's history, during the solar system's chaotic beginning, they ...

Only 43 (to date) have been observed directly (about 0.5% of them). Most are discovered through indirect means, such as radial velocity or the transit method. The transit method is where you look at ...

We tend to think of habitability in terms of individual planets and their potential to host life. But barring outliers like ...

This strange exoplanet, located 140 light-years away from Earth in the constellation Pegasus, appears to be rapidly falling apart. Its blistering host star is so close, the radiation is effectively ...

What's more, no exoplanets with emission spectra cooler than 275 K (1.85 °C; 35.33 °F) - comparable to Earth - have been ...

"The extent of the tail is gargantuan, stretching up to 9 million kilometers [5.6 million miles] long," said MIT astronomer ...

Scientists are examining its massive dust trails, offering rare insights into the composition of terrestrial exoplanets. Researchers from MIT ...

Astronomers have spotted a small rocky planet that orbits perilously close to its host star disintegrating as its surface is ...

This event indicated the exoplanet had a planet-to-star mass ... reflects the differences in formation processes between terrestrial planets and massive gas giant worlds. Discovering a larger ...