Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' festival from Feb. 13-17.

There are eight planets in the solar system, and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some ...

Witness a rare celestial spectacle as seven planets align in the night sky for one night in late February, offering a ...

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

A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according to ...

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

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

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

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

From planets and constellations, to eclipses and the Aurora Borealis, here's what to look for in the sky this spring ...

It actually follows its own tiny elliptical orbit around what is called the center of gravity (the barycenter) of the system, the sun and the orbiting planets. This barycenter is usually not equal ...