If you mean "star", they are USUALLY bigger than planets. However, a "dead" star (one that ran out of fuel for nuclear fusion) is actually smaller. Those are called white dwarves, neutron stars, and black holes.
A planet is bigger than a university. You probably meant a universe and a universe is bigger than a planet.
A universe is bigger than a planet.
They all are bigger than an asteroid.
A planet is usually bigger. However there are exceptions. For example "Ganymede", the largest satellite of Jupiter, is bigger than the planet Mercury.
Mars. Not Mars. Jupiter is a lot bigger than Earth, but the Sun is much bigger than a planet.
Mars, because Mercury is the smallest planet we have now either than pluto when it used to be a planet. Hope this helped! Caleigh (kay-lee)
Planet x does not exist.
Although we don't know for certain, but it it highly likely that the Sun will be bigger than any planet. It is certainly bigger than all of the planets in our Solar System.
None
yes it is.
None. The sun is much larger than any planet.
Jupiter