Early 2025 is a good time for skygazing and spotting up to seven planets in the night sky – if you have a little help.

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Smaller gas giants are less likely to survive in such systems, surrounded by clashing planetary titans. With their lower ...

But later – hundreds of millions of years in the future – a permanent, virtually ringless Saturn will become real, thanks to another process called ring rain in which gravity pulls the rings apart and ...

Astronomers have discovered an Earth-size planet that is showered with so much radiation, its atmosphere eroded away long ago ...

Opinions expressed by Forbes Contributors are their own. I cover aerospace, astronomy & hosted The Cosmic Controversy Podcast. At least 50 billion planets in our own Milky Way galaxy are likely to ...

Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.

Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf planet's mysterious heart ... roughly the size of Arizona from north to south. Pluto was discovered ...

In 1992 astronomers reported the first planet-size masses around a dead star, the pulsar PSR1257+12, which sits 2,000 light-years away. Three years later came news of the first known exoplanet ...

Astronomers believe that Planet Nine could be 5-7 times the size of Earth and situated more than 200 times farther from the sun than our planet. It is believed to orbit the Sun in 10,000 to 20,000 ...

Tucked away in a star-forming region in the Taurus constellation, a pair of circling stars are displaying some unexpected differences in the circumstellar disks of dust and gas that surround them ...