For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, Amy Simon (NASA-GSFC), Michael H. Wong (UC Berkeley) / VISUALIZATION: Joseph ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in ...

The search for life beyond Earth is a holy grail quest for many experts, but finding where to look is a core issue.

ESA has just released the first-ever images taken of the Sun's south pole, as seen this year by the Solar Orbiter spacecraft.

The robotic Solar Orbiter spacecraft has obtained the first images ever taken of our sun's two poles as scientists seek a ...

NASA’s PUNCH mission is mapping the solar wind and explosive solar events in 3D, offering new insights into space weather ...

It’s been 18 years since Pluto’s celestial status was called into question—yet the matter seems far from settled. We asked experts from both sides to make their case. This 2015 NASA image of ...

As climate change accelerates and politicians continue to argue, scientists are exploring radical new ways to protect our ...