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?

So far the parade has featured six planets: Jupiter, Mars, Neptune, Saturn, Uranus and Venus. Feb. 23-26, they will be joined by a seventh, Mercury, which has just started to crawl above the horizon, before Saturn soon falls away. But again, this really depends on where you live.

The best opportunity to potentially see all seven planets is coming up on Feb. 28 around 6:10 p.m. ET, according to Shanahan. Mercury, which is the closest planet to the sun, would be the first to be seen right above the horizon as the sun is setting.