If Earth suddenly orbited a second sun, temperatures could spike, seasons would vanish, and gravitational chaos might follow—scientists say the planet’s survival would be nearly impossible. [second su ...

Mars was once rich with flowing water. Today, it's a cold, dusty desert marked by dried riverbeds and empty lake basins.

NASA believes that the month of May brings visibility to four planets, a new star from a nova, a chance of meteor showers and ...

The origin of reptiles on Earth has been shown to be up to 40 million years earlier than previously thought -- thanks to evidence discovered at an Australian fossil site that represents a critical ...

X2.7-class eruption from sunspot AR4087 disrupts radio signals as the active region rotates toward Earth, raising the risk of more flares ahead.

You’d have thought it would be pretty simple to say when summer starts - but it’s a bit more complicated than that.

Super-Earths might be far more common in the Universe than previously thought. A recent study using the KMTNet telescope ...

Scientists from NASA and Toho University in Japan predict that Earth will become uninhabitable in about a billion years. The ...

Of the more than 5,000 exoplanets that have been confirmed so far and many more thousands of candidates, most orbit stars the ...

NASA's Europa Clipper spacecraft, en route to Jupiter's icy ocean moon Europa, recently captured a ghostly infrared portrait ...

Starlink is intended to give humanity all sorts of benefits, but astronomers are worried about some potential consequences of ...

Sen, a company based in London, provides views of Earth from orbit, with the hopes of making an experience usually reserved ...