There are other stars, many of which are bigger, smaller, or about the same size as our Sun.
Asteroids, meteors, etc.
because the sun is not shining on you when you are under something big
The object is actually lighter on the Sun
Jupiter is the largest object that orbits the sun.
it looks like a big piece of badalhoca
The Sun diameter is 1,390,000 kilometers and it is the largest object in the solar system. Amazingly its mass corresponds to 99.8% of the total mass in the solar system.
The sun is a star.
If you mean in the solar system, then the answer is the sun. Jupiter and Saturn are also some big masses in the solar system. In the galaxy, the largest object is probably the black hole in the center.
The bright object the Earth revolves around IS the Sun.
The size of a shadow depends on the angle of the sun and the object casting the shadow. At 9am, when the sun is relatively low in the sky, your shadow would be longer than at midday when the sun is directly overhead.
The position of the sun relates to the length of the shadow cast by an object because, when the sun is above the object there is no shadow yet, when the sun is say to the east of the object a shadow is cast towards the west, the farther the sun for example east the longer the shadow will be towards the west.
The sun is about 15,000 km big