Around this time of year, if the weather is clear, just before dawn you might be able to see Sirius, the brightest looking ...

Before defining what a light-year is, we should define what a light-year is not: It is not a measure of time, but rather a ...

Researchers studied the L 98-59 system and confirmed five rocky planets. One is in the habitable zone and may support liquid water.

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

Astronomers have, for the first time, observed the very beginning of planet formation around a star beyond our Solar System.

Saturn rises around midnight, and Venus around 2 a.m. Jupiter is low in the east before dawn; Venus is brighter and whiter.

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to oblivion ...

In a cosmic first, scientists watched planet-forming materials begin to solidify around a newborn star, offering a peek into what our Solar System may have looked like at birth. It’s a stunning replay ...

A team led by UdeM researchers confirms a fifth potentially habitable planet around L 98-59, a red dwarf 35 light-years away.

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...