Overnight from Aug. 20 to 21, the blue supermoon will pass in front of — or occult — the ringed planet Saturn. Although ...

Observers could see up to seven planets line up in the sky after sunset on Friday, but you may need a telescope to see them all.

Five planets are visible to the naked eye, according to NASA: Mercury, Venus, Mars, Jupiter and Saturn. Mars will appear reddish and high in the sky, near the Gemini constellation, Star Walk said.

Seven planets are on display in the night sky at the end of February, but some will be harder to spot than others. Here’s what you need to know to catch a glimpse.