The four-planet lineup that began in January concludes by mid- to late February, as Saturn sinks increasingly lower in the ...

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

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Around the time of your romantic dinner, head outside and look to the southwest to spot the super brilliant planet in the night sky ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may ...

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through to February.

Derived from the Greek words peri (around) and helios (sun), the ... way beyond the orbit of Neptune, then zip past the sun before disappearing again for centuries. Due to their irregular shapes ...

Spotting one or two of the planets in our solar system is well worth a good skywatch, but seeing (almost) all of them in a ...

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

But of these planets, which is nearest to the sun? Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, ...