The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

AN alien world “suffers star-grazing torture” every 111 days as its fiery sun boils the planet to a hellish 1,093C. This ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

Located less than 20 light years away, HD 20794d could potentially be one of the most Earth-like planets found so far, ...

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear ...

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

Certain extreme planets are called ultra-short period objects if they're very close to their stars and orbit them in mere hours, like K2-22b.

Named HD 20794 D, the newly discovered exoplanet orbits a star similar to the Sun, and researchers believe it may be able to ...

The exoplanet HD 20794d swoops in and out of its habitable zone every few hundred days, making for an extreme climate.