Expert says the planet parade will be best viewed around 21 January and recommends downloading a sky map app to help spot them

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Stargazers are being treated to a rare “planet parade” this month, with most of the planets visible in the night sky at the same time.

Astrophysicist Dr Rebecca Allen, co-director of Swinburne University’s space technology and industry institute, said it would be a rare opportunity to see so many planets lined up above the horizon, especially outer ones like Neptune.