  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.
Its Great Red Spot. The Great Red Spot is a giant storm in its atmosphere. It's so big that three earths could fit inside it! Also because Jupiter has clouds that can move up to speeds of 300 miles per hour. Jupiter's atmosphere is like a bubbling pot of paints that swirl but don't mix. On Jupiter, lightning is always flashing. Jupiter is also known because it is the biggest planet in our Solar System.