No, the Sun is not bigger than Jupiter. In fact, the Sun is significantly larger than Jupiter. The Sun is a massive star, while Jupiter is the largest planet in our solar system. To put things into perspective, the Sun has a diameter of about 1.4 million kilometers (870,000 miles), while Jupiter has a diameter of approximately 143,000 kilometers (89,000 miles). The Sun's size is so vast that it is over 1,000 times larger than Jupiter by volume.