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.

Mars, Jupiter, Uranus, Neptune, Mercury, Saturn and Venus -- will be visible simultaneously and look like they're all aligned when seen from Earth after sunset. A long awaited astronomical event dubbed as the planet parade or planetary alignment when four planets are visible to the naked eye on the evening sky,

It is being called a "planetary parade" as seven planets are expected to be seen in the Earth's night sky on Friday, astronomers said.