Sometimes, not all four are visible at the same time as one or more of the moons may be passing behind Jupiter.
People around the world can look to the night sky this month to see Jupiter shining bigger and brighter than it will at any other point this year.
"In steadily-held 10× binoculars you can pretend you're Galileo and rediscover its four brightest moons ..." This means Jupiter is pretty near Earth, and you can spot it lurking within the sky all night long. The planet and even its moons can be seen and not using a telescope, and Jupiter will probably be near Earth than at another time for the rest of the year.More news: Hong Kong protest draws hundreds of thousands over extradition bill
"Although opposition takes place on a specific date, the entire month or so around opposition is an equally good time to observe the planet", NASA notes.
Besides this, Jupiter is the giant planet from our Solar System and can be spotted with the naked eye, but it's better if you look for the marvelous planet with binoculars or a small telescope.
The Jupiter opposition is not a rare event, happening once every 13 months. In fact, it is over twice the size of all the other planets combined.More news: Mr Fixit’s England Women v Scotland Women Preview
The stripes and swirls on the planet are actually clouds of ammonia and water floating in Jupiter's atmosphere of hydrogen and helium. On June 17 and 18, Mars and Mercury will appear very close together in the sky immediately after sunset.
Also, from June 14 to 19, the moon will line up with Jupiter and Saturn in the sky.More news: Penn State Hoops Will Play Wake Forest In Big Ten/ACC Challenge