In a cosmic first, scientists identified signs of early planet formation by looking deep into the gas disk around a baby star ...

Almost everything you could want to know about the closest planet to the Sun, Mercury. Real HD photos and videos taken by the ...

There's a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic mystery. Astronomers have cataloged a frozen minor planet called 2017 OF201 ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

Between February 25 and February 28, all seven planets in our solar system will be visible in the night sky. (Credit: WSET) You'll need a telescope for some of them, but you should be able to find ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago.

Hunting for exoplanets An exoplanet is any planet outside of our own solar system. Like the planets in our solar system orbit the sun, most exoplanets also orbit a star.

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

Six planets were visible in January — four to the naked eye — and now a dim Mercury joins the gang. FILE – People look up to the sky from an observatory near the village of Avren, Bulgaria ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Astute skywatchers may have already seen the striking line of planets across the night sky in January. This week Mercury joins the queue. Now every other world in our solar system will be visible ...

The planets in our solar system orbit the sun in roughly the same plane, known as the ecliptic, which is tilted relative to Earth's equator by about 23.5 degrees.