Jupiter and Saturn are in conjunction once every 20 years, NASA reports in a statement. In December 2020, Jupiter and Saturn appeared so close to each other that they resembled a giant star in the sky in what's known as the "Great Conjunction," Inverse reports. The last time this happened was 400 years ago.

What planets will align in 2021?

The closest conjunction of two planets for 2021 happens on August 19 at 04:10 UTC. Depending on where you live worldwide, Mercury and Mars will appear at their closest on the sky's dome at evening dusk on either August 18 or August 19. They are exceedingly low in the west after sunset.

Are 5 planets aligned today?

For the first time since 2005, you'll be able to see all five visible planets (Jupiter, Mars, Saturn, Venus, Mercury) at once – if you get up early enough to see the perfect moment in the dawning night sky, that is.