What is the single largest stellar object ever dicovered with a physical mass?

Question

The question being asked does not include "Black Holes." Mainly because that they are usually very large in size, but their mass is unkown.

Answer 1

I googled "biggest star" and the first hit was the one below. The answer is the Pistol Star, which I never heard of before. Wikipedia also mentions Eta Carinae, which I have heard of before.

Answer 2

I found a site that says the answer is superclusters (of galaxies)

http://curious.astro.cornell.edu/question.php?number=323

What is the largest structure in the universe?
Hi! I have a question regarding the scale of the cosmos. My question: What is the largest structure in the universe?

The largest structures in the universe are superclusters, which are large associations of galaxies that can extend over distances of more than 100 million light-years.

I just did a quick search through the literature, and the largest supercluster on which I was able to find any information is the Sculptor Supercluster, which, according to the supercluster catalog compiled by a group of astronomers at Tartu Observatory in Estonia and the IUE Observatory in Spain, is nearly 1 billion light-years away, and extends roughly 250 million light-years from end to end. That's not to say that there might not be some larger superclusters out there, but astronomers don't have any reason to believe that there are any structures bigger than superclusters.

Answer 3

Actually black holes have huge masses but small sizes but that was not your question. I suppose it depends on if you want to consider gas clouds "stellar objects" .. if so then it would be gas clouds which can cover many square light years. In all actuality, however, the word "stellar" refers to "stars". The largest star so far found is about 1,500 times larger than our sun.

Answer 4

black holes have huge masses but small sizes but that was not your question. I suppose it depends on if you want to consider gas clouds "stellar objects" .. if so then it would be gas clouds which can cover many square light years. In all actuality, however, the word "stellar" refers to "stars". The largest star so far found is about 1,500 times larger than our sun.

Answer 5

your question is too ambiguously stated to provide an answer... it really depends on your definition of an object... are you refering to an object with a tangible surface? planet, star, or black hole? Is a gas cloud considered an object.. they do have mass, it is just widely dispersed.... if gas cloud is considered an object then we might as well push it to is a galaxy or the universe itself as an object? They both have mass, though widely dispersed...

So... depending on what you consider an object....

Pistol Star is the most MASSIVE star found to date, however it is not the most volumous...

It is theorized that the center of galaxies contain super massive black holes, black holes that have combined and formed even larger black holes...

If you are talking on a larger scale.. I am afraid that I do not believe there is a qualifying answer, as no-one to my knowledge has undertaken the task of calculating galactic or larger mass.

Answer 6

with out a doubt it is kx45, it is in the center of the solar system 2 galaxies away from ours, and it is about 153,970x645,933 times bigger than our sun. Its gravitational mass is so massive that it would take an equation a lot bigger than this site to figgure it out.

Answer 7

If you mean a certain star, then Eta Carinae, if you mean just object, the biggest objects we know of are giant elliptical galaxies, they dwarf even the biggest spiral galaxies, they eat them for breakfast, literally.

Answer 8

Technically, the word "stellar" refers to any stars, so I guess you're talking about something like supergiants? (Supergiants being the largest stars in the Universe.)

Answer 9

Oprah Winfrey's head! The thing has its own moon revolving around it, and people are sucked in to watching her every afternoon.

Answer 10

The dump I took this morning.