  Since 990 is divisible by ten, the answer is 990. If you were rounding off 994 the answer would also be 990. If you were rounding off 995, the answer would be 1,000.
Jupiter is the largest and most massive planet in the solar system. It was named after the chief Roman god. It is a gas giant composed of liquid and gaseous matter, and has many moons. Some of the storms in its atmosphere have lasted hundreds of years.
The dustiness of the atmosphere gives Mars its characteristic appearance. Jupiter. Jupiter is the first of the gas giants, and the largest planet in the solar system. Its atmosphere is, interestingly, fairly similar to the composition of the Sun. Unlike the inner planets, there isnât a clear point at which the atmosphere of Jupiter stops, and the liquid interior of the planet begins.