To see the parade, find a dark place with a clear view of the western horizon at nightfall. Mercury and Saturn will be low in the sky, brushing past each other in the fading glow of the evening sun, which will make the pair difficult to spot. Trace that line of sight higher to find Venus, the most brilliant planet in the sky.

Are 7 planets having a rare alignment in our night sky? News of this unusual celestial event has been flooding social media in the last several days. But what will you really be able to see?

We have a "Great Planetary Alignment" coming up later this week, and if the weather cooperates, night sky watchers in Boston could get a glimpse of this rare sight. You may have heard whispers about this over the last few months,