  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.
Jupiter is a gas planet, meaning that it is mainly made from gas, rather than having a clear rocky surface. The atmosphere on Jupiter just gets thicker and thicker the deeper â¦ you go into the planet, while for Earth, there is an atmosphere, but then a clear rocky surface.