Here are a couple more listed here:

LARGEST STAR

UY Scuti – Largest Known Star

VY Canis Majoris is the largest star (in diameter) that we know of. It’s in a class of star known as Red Hyper Giants. It’s 1,420 times the sun’s radius and would take the world’s fastest race car 2,600 years to circle it once. If you replaced our Sun with VY Canis Majoris, its surface would extend out beyond Saturn. (see picture to the right for comparison to our own sun).

Update: In 2013, NML Cygni was verified as the largest known star. It’s a whopping 1,650 times our sun’s radius. That is so large; it would take a beam of light 6 hours and 40 minutes to circle it once.

2nd Update: Science continues to astound us! Now beating out NML Cygni, UY Scuti is the leading candidate for the largest star ever discovered. At 1,708 times our suns radius, if the earth was the size of a basketball, UY Scuti would be 125,000 feet tall!

LARGEST BLACK HOLE

Black holes are not physically large regions of space. But when you include their mass, they are among the top competitors for the largest things in the universe. And quasar OJ287 is the largest black hole we’ve spotted.Black Hole at the center of NGC1277 It’s estimated to be 18 billion times the mass of our sun and is a supermassive black hole located in the center of a galaxy. To put that in perspective, it’s an object larger than our entire solar system. Just how big can a black hole get? According to scientists, there is no theoretical upper limit.

Update:  – Science never fails to keep impressing us with its newest discoveries. Researchers at the University of Texas, using the Hobby-Eberly Telescope, have discovered what they claim to be the largest supermassive black hole yet. The black hole, a whopping 17 billion solar masses, resides at the center of galaxy NGC 1277. That is so huge, it accounts for 14% of the entire galaxy’s mass. The event horizon is 11x the diameter of Neptune’s orbit around our sun – that’s a radius of over 300 AU.

We hope you like the video and we can’t wait to see what they find next with the newest telescopes being built right now.

thanks to zidbits for the great info