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

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

Specifically, researchers have identified for the first time an organism capable of maintaining metabolic activity in a ...

What is the hottest planet in the solar system? If you want to know which is the hottest star in the solar system, this ...

Credit: Robert Lea (created with Canva) Habitable zones are defined as regions around stars that are temperate enough to allow liquid water to exist at the surfaces of terrestrial planets within ...