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

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

For four months, social media has drawn skywatchers and lovers of galactic lure to a speck spotted in July. A new visitor from beyond our solar system University of Texas at Arlington Astrophysicist ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a ...

NASA says Earth is about halfway through its lifespan. Scientists explain how solar changes could affect habitability, oceans, and the planet’s future over billions of years ...

Where did all the water come from? Water, water everywhere. It covers 70 percent of Earth’s surface and earns it the nickname “the blue planet.” And yet… where did it come from? How is it so abundant ...

Add Yahoo as a preferred source to see more of our stories on Google. The OSIRIS-REx spacecraft spent two years observing the asteroid Bennu before it collected a ...

Two perplexing structures deep inside Earth might be ancient remnants of our early planet. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Geological evidence, including an Ordovician-era increase in earthquakes, tsunamis, meteorites, and crater formation, suggests a significant celestial event approximately 466 million years ago. A ...