Hello, I'm an expert in astrophysics with a focus on stellar phenomena. When comparing the scale of astronomical objects, it's important to clarify the context of "bigger." If we're talking about physical size, then there are several objects that can be larger than a supernova, which is the explosion of a star. However, if we're referring to the energy released or the impact on the surrounding space, then a supernova is one of the most energetic events known.

Now, let's address the question with the assumption that we're talking about physical size. Here are a few objects that are larger than a supernova:


1. Neutron Stars: These are the remnants of a supernova explosion and can be up to 1.4 times the mass of the Sun but with a diameter of only about 20 kilometers (12.4 miles).


2. White Dwarfs: Although not as massive as neutron stars, white dwarfs can be larger in volume, with sizes comparable to Earth.


3. Planets and Stars: Planets like Jupiter are much larger than a supernova remnant, and stars, especially red giants and supergiants, can be hundreds to thousands of times larger in volume than the Sun.


4. Galaxies: Entire galaxies, which contain billions of stars, are vastly larger than a single supernova.


5. Clusters of Galaxies: These are the largest gravitationally bound structures in the universe, containing hundreds or even thousands of galaxies.


6. Superclusters and Cosmic Web: On an even larger scale, there are superclusters and the cosmic web, which are the largest known structures in the universe.

7.
Black Holes: Especially supermassive black holes at the centers of galaxies can be extremely large in terms of mass and influence, though not in physical size compared to the event of a supernova.

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A hypernova explosion, the possible source of powerful gamma-ray bursts, is about 100 times more energetic than a supernova explosion and is thus the most energetic event known in the Universe other than the Big Bang.read more >>