Which planet is the largest?

The largest planet discovered so far is Supergiant star R 136al, with a diameter of 4.5 billion kilometers.

This is an amazing data, equivalent to 4.5 billion times that of the sun. Comparing the earth to marbles, the sun is like basketball, but if the sun is compared to Lambert Supergiant star R 136al and Lambert Supergiant star R 136al to the whole playground, the sun is just a speck of dust on the playground.

Compared with this planet, the earth is really nothing. It is at least as big as 3200 suns. It takes at least a few hours to orbit the planet at the speed of light, and less than 20 seconds to orbit the sun at the speed of light. This huge planet shows us how big the universe really is. It is still the largest planet we have found so far. There may be a bigger planet than this one where we haven't found it yet, but not necessarily.

Introduction of R 136al

R 136a 1 is a Wolff-Rayet star rich in hydrogen and the largest known star in the list of massive stars. The mass of this star is estimated to be 265~3 15M⊙ measured by astronomers from the University of Sheffield. This star is also listed as the brightest star, with luminosity of 8.7 1× 10 6L ⊙. Located in the Tarantula Nebula in large magellanic cloud, it is a member of the R 136 supercluster near the Sagittarius 30 complex.

R 136al is a blue Supergiant star, which is 165000 light years away from the solar system and10000 times brighter than the sun. It is the largest of all known planets, and its diameter is uncertain. Some scientists say it is 3,200 times that of the sun, and some scientists say it is twice that of Dog Six. In a word, the diameter of R 136al is not less than 44.56.

Reference to the above content: Baidu Encyclopedia -R 136a 1