Earth” orbits a relatively close, Sun-like star, and could be a habitable world – but one of extreme temperature swings, from scorching heat to deep freeze. Key Facts The newly confirmed planet is the ...

The planet is about six times more massive than Earth and could be rocky, offering a unique opportunity to study a heavier ...

A new world has just been found orbiting a Sun-like star only 20 light-years away, and it could be one of the most promising ...

With an orbit of 647 days, HD 20794 d is similar to Mars in our solar system. However, its orbit around the star is highly ...

As it orbits its star, it moves close enough at one point to experience extreme heat, similar to Venus’s temperature. But at its farthest point, the planet is nearly twice the distance from Earth to ...

Earth, HD 20794 d, in the habitable zone around a Sun-like star 20 light-years away. With a mass six times that of Eart ...

According to experts at the University of Oxford, the planet known as HD 20794 d has a mass six times greater than Earth's ...

Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been ...

Astronomers have discovered nearly 6,000 planets beyond our own solar system. Here's how — and how we'll find even more.

The Cherenkov Telescope Array just got a major boost for distributing its data, a development that will expedite scientific discovery using the observatory.