Which planet is the largest in the universe?

The largest known planet in the universe is the star R 136a 1.

The star R 136a 1 is the largest mass star we know so far. Located in the tarantula nebula of large magellanic cloud, it is one of the brightest stars known. R 136a 1 is a blue Supergiant star, its mass is about 300 times that of the sun, and its luminosity is100000 times that of the sun. If placed in the center of the solar system, its brightness will be equivalent to the brightness of the sun relative to the moon. The surface temperature of this star is over 50,000 K, which makes it look blue.

The discovery of R 136a 1 was recalculated by astronomer Paul crowther of the University of Sheffield and his research team using the observation data of Hubble Space Telescope and European Southern Observatory Very Large Telescope. Before that, pistol star and Ita constellation (Haishan II) were considered as the stars with the largest mass, but they were all dwarfed.

The voice of doubt about the stars R 136a 1

The amazing weight of R 136a 1 has also been questioned by scientists. The American media believe that even a high-precision telescope is sometimes difficult to judge whether it is a "Big Mac" or a pair of very close twins in a very distant space. Mark Krumholz, an astronomer at the University of California, questioned that R 136a 1 might be a binary star.

Philip Marcy, an astronomer at Lowell Observatory in Arizona, also pointed out that crowther and others used scientific models to calculate the mass of stars, but the model itself was not necessarily 100% accurate. Although Krumholz and Marcy both agree that if R 136a 1 is really a pair of binary stars, the X-rays detected by the telescope should be stronger.

Crozet said that R 136a 1 may have a "companion star", but its mass will be much smaller. This means that the initial mass of R 136a 1 may not be 320 suns, but 300 suns.

Refer to Baidu Encyclopedia -Star R 136a 1 for the above contents.