Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

The sun has had quite a busy week hurling solar flares at our planet, causing blackouts across the globe. “After weeks of ...

These alignments don’t happen every day, so if you’re an early riser or looking for a reason to wake up before sunrise, this ...

An international team from Taiwan, Japan, and Australia used 40 years' worth of data from two space probes to track down what they believe are signs of this distant planet moving around our sun.

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million years. Uranus and Neptune were next, within 10 million years. The inner ...

A breathtaking new video compresses more than a decade of deep-space observation into a few seconds, revealing the hypnotic ...

This is probably the most convincing evidence for Planet Nine so far. It is believed that this planet is five to ten times bigger than Earth and has an orbit wildly different from ...

At the center is the sun, a yellow dwarf star ... from the eight major planets to dwarf planets, comets, asteroids, and icy objects — revolves around it. The solar system also includes the ...

Scientists examined infrared space surveys to narrow down candidates for Planet 9. Planet 9 would be so far from the Sun that it is just not illuminated by much sunlight. The two space surveys, ...

Plato, the European Space Agency's terrestrial planet hunter spacecraft, is seen after having 24 of its 26 cameras installed.

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?