10 things in the universe so huge they'll blow your mind

One of the most fascinating facts about space is how vast it is. The universe is so big it's hard to wrap your head around the sheer scale -- it's about 94 billion light-years in diameter, or 546 sextillion miles across.

To help try to put that into perspective, here are 10 of the biggest things of the universe in order of smallest to largest:

10. Ceres -- The biggest asteroid ever discovered by humans was found back in 1801. It's 600 miles in diameter. Some scientists argue that it could be considered a dwarf planet.

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9. Ganymede -- The biggest moon in our solar system orbits around Jupiter. It's about 3,273 miles in diameter, and it's larger than Mercury and Pluto.

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8. Wasp 17b -- The biggest planet discovered by humans is an exoplanet some 1,000 light-years away that can be found in the constellation of Scorpius. It's more than 173,000 miles in diameter. It's twice as large as Jupiter with only about half the mass, giving it a low density and the nickname of the puffy planet.

7. NML Cygni -- This red "hypergiant" star is the largest known to man with a diameter of more than 1.4 billion miles. That makes it 1,650 times as large as the sun. If you put it at the center of the solar system, it would eat up at least five planets, including our own.

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6. S5 0014+813 -- It may have the most boring name ever, but this is the largest black hole ever discovered. With a mass of 2 octillion kilograms, it's a 147 billion miles in diameter. Every year is consumes about 4,000 of our suns worth of mass.

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5. Lyman-alpha blob 1 -- This massive primordial cloud of hydrogen is more than 300,000 light-years across. That's three times as big as our Milky Way galaxy. Scientists think the blob may be involved in the formation of new galaxies.

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4. IC1101 super galaxy -- As you might guess by the name, this galaxy is the largest discovered by man. More than 6 million light-years across, experts believe it was formed by the collision of other galaxies.

3. Canes venatici supervoid -- The biggest patch of "nothing" in our universe is 1.3 billion light-years in diameter. While not technically empty, the huge area has drastically less mass than it should according to Einstein's principal that the universe should be essentially similar in most places.

2. Huge LQG -- This quasar group is 4 billion light-years across, the largest in the universe. This grouping of 73 qausars is a size previously thought to be theoretically impossible. At the speed of light it would take 4 billion years to cross it -- which is the time it took for the Earth to form and for human life to begin.

1. Hercules-Corona Borealis Great Wall -- The largest structure in the universe is made up of groups of galleries held together by gravity, and its size and age have scientists questioning their beliefs about the age of the universe.

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