Zipping toward Earth at around 20,000 miles per hour, the asteroid is due to make its closest approach on Tuesday.

With findings on Earth’s polar extremes and its innermost core, scientists shaped how we look at the planet in 2025 in ...

How did life begin on Earth? While scientists have theories, they don't yet fully understand the precise chemical steps that ...

When Earth was a molten inferno, water may have been locked safely underground rather than lost to space. Researchers ...

Earth keeps getting warmer because more energy from sunlight stays trapped in the climate system. Scientists refer to this as ...

Every year, millions of people across the globe gather to mark Earth Day and celebrate the environmental movement. The event began in 1970 in the United States, and is now marked around the world.

It is with a heavy heart that I announce that NASA Earth Science Communications has directed The Earth Observer to conduct an ...

Earth's orbit is an ellipse, not a perfect circle. Earth's distance from the Sun varies by about 3 million miles throughout the year. Earth's orbit's semimajor axis is approximately 93 million miles.

Our planet is in constant flux. Tectonic plates—the large slabs of rock that divide Earth’s crust so that it looks like a cracked eggshell—jostle about in fits and starts that continuously reshape our ...

The moon's orbit around Earth appears so regular that civilizations have based the month on lunar motion for thousands of years. However, the moon is actually creeping slowly away from Earth. So will ...

Here are 10 exoplanets regarded as the most Earth-like alien worlds discovered to date. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Since the ...