If you looked up at the pre-dawn sky last night, you witnessed a celestial show. Five planets aligned and were visible to the naked eye: Mercury, Venus, Saturn, Mars and Jupiter.

Mercury, Venus and Jupiter were lower in the Western night sky and easier to see at dusk while Saturn and Mars shone brightly in the Southern sky, forming something of a celestial triangle with Antares.

An illustration shows how Mercury, Venus, Mars, Jupiter and Saturn will appear to line up in August These planets and stars aren't exactly lining up, but it'll seem as if they are when you spot them in the sky. (Photo: EarthSky.org)

As the Slooh Observatory explained, even though the planets appeared to be lining up, they weren't actually aligning. Think of it more as two different groups of friends who just happened to show up at the same restaurants at the same time but were sitting at different tables in different sections of the restaurant instead of two tables right next to each other.

Slooh also hosted a livestream of the planetary gathering in conjunction with Time Kids, complete with live views of the planets from their Canary Islands observatory and interviews with Mars One finalists.

Not the first time this year (and not the last)

If this sounds familiar, it's because a similar event occurred on Jan. 20, when you would have caught the planetary hangout just before dawn. If you were in open field with a dark, clear sky and looked toward the moon, you would have been able to see the planets shining brightly in the sky (they would've been less twinkly than stars, making it easier to pick them out). They lined up from east to west, with Mercury, Venus, Saturn, Mars and Jupiter.

Five planets alignedAs this image shows, the stars Antares and Spica provided reference points for finding the lined up planets. (Photo: EarthSky.org/Facebook)

And if you missed both 2016 planetary parties, you've got another chance: Mark October 2018 on your calendar to see this phenomenon.

Savvy astronomers may notice that the grouping of the planets in the sky does not follow their order from the sun, which we all of course remember thanks to the mnemonic "My Very Educated Mother Just Served Us Nine Pizzas," Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and dwarf planet Pluto.(What, you don't remember that one??)

You'll be glad to hear that the planets' order from the sun hasn't changed, but the path and plane that they follow around the sun means that when we see them, they shift around in our views.

Need help locating the planets? Try one of these awesome free apps for stargazers.

This story was originally published in January 2016 and has been updated with new information.

5 planets gather together in the night sky for a celestial hangout
The planets Mercury, Venus, Mars, Jupiter and Saturn appeared to line up for a stunning celestial display.