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(SPACE.com) -- Astronomers on Earth will have ringside seats to a face-off between two of the biggest storms in the solar system.
In one corner will be Jupiter's Great Red Spot, a behemoth of a tempest that is twice as large as Earth and whose 350 miles per hour winds have been whirling for hundreds of years.
Its contender will be Oval BA, also known as "Red Jr.," a young six-year storm that is only half Great Red's size but whose winds are just as fierce.
The two are approaching each other now and are expected to have their closest approach on the Fourth of July, according to Amy Simon-Miller, an astronomer at Goddard Space Flight Center in Maryland who has been monitoring the storms.