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Stargazers will be treated to a spectacular sight this month when the night sky lights up with a parade of planets.

Saturn, Jupiter, Mars and Venus will appear in the sky alongside the moon, becoming bigger and brighter and viewable to the naked eye.

Early birds on July 12 will be able to see the spectacle an hour before sunrise, with planets becoming visible throughout the night.

“Jupiter and Saturn will be visible in the east just after sunset,” Jacquie Milner from Mount Burnett Observatory told 7NEWS.com.au.

“They will be visible all night long.

“Jupiter is much brighter than Saturn (and it) will be much brighter than any other stars in the east, and Saturn is not far from it.”

Mars is best viewed after midnight and it will stand out as a red star off the top of the right star of the Great Square of Pegasus, Milner said.

“Venus is on the morning side of the Sun, rising around 4am (AEST),” she said.

“Venus is the brightest planet, outshining all the stars. It is near the V-shaped face of Taurus the Bull.

“Mercury will be visible in the morning twilight to the lower right of Venus during the third week of July.

“A very thin waning crescent Moon will be to the left of it on the morning of the 19th.”

But some planets will be viewed better on their own, with July 14 singled out as the best night to see Jupiter, which will be at its biggest and brightest.

The biggest planet in the solar system will be closest to Earth, directly opposite our planet to the sun - a position called “opposition”.

Saturn will reach opposition on July 21.

“Jupiter and Saturn are at their best this July,” Milner said.

“It doesn’t make a big difference with Saturn, but it makes a small difference with Jupiter.”

Red planet

Milner said the best time to see Mars on its own will be later this year.

“Mars won’t be at it’s best until October this year when it reaches its opposition,” Milner said.

“Oppositions of Mars only occur once every two years and two months, and because Mars’ orbit is quite elliptical, some oppositions are ‘good’ and some are ‘bad.’

“The cycle from good to bad takes 17 years, and the last one in 2018 was near the best it could be, but the view was ruined by a global dust storm on Mars.

“Mars’ brightness will change markedly during opposition as well, becoming as bright as Jupiter at its peak, then gradually fading back down over several months.”

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