Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

According to these calculations, Earth's total lifespan will be about 9.5 billion years.

A growing body of peer-reviewed research now points to a stark conclusion: multiple Earth systems have already moved beyond ...

As much as 45 oceans’ worth of hydrogen may be in Earth’s core, scientists reported, suggesting most of Earth’s water was ...

A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...

Even when Earth was locked in its most extreme deep freeze, the planet’s climate may not have been as silent and still as once believed. New research from ancient Scottish rocks reveals that during ...

Alexander Venner picked his way by hand through the data collected by a now-retired NASA telescope called Kepler, which ...

An experiment to quantify the amount of the universe’s lightest element in Earth’s core suggests that the planet’s water has mostly been here since the beginning ...

"I strained my eyes and peered intently into the darkness. No, there could be no mistake. I could definitely see land." ...

NASA has selected two Earth science missions for development, one focused on studying the atmosphere and the other on terrestrial ecosystems and ice.