what is the hugest, biggest, the most enormous object in space?

Question

is it a planet, a star or something that is the biggest object in space?

Answer 1

Solid object? A supermassive star. Not solid object? Supergalactic clusters.

Answer 2

That depends what you call object. Can an object be a collection of other objects, like a galaxy is the grouping of several billion stars clustered together?

Can a cluster of galaxies (galaxies gravitationally locked together) be considered an object?

Can a gas cloud -- tens of light years in size -- just a mass of atoms and molecules floating in space, but gravitationally bound and which might eventually collapse on itself to create a new star be considered an object?

Depending on your definition, then finding what is the largest would be easier.

For single objects, any planet that reach a certain size attracts too much hydrogen gas and it has to be a star. Stars have a maximum theoretical size, about a few hundred of times the mass of our sun. Anything more and they cannot hold together. A star so massive burns in just a few thousand of years -- compared with about 10 billion years for the sun.

Answer 3

The biggest limitation is the time differential of a craft moving at relativistic speeds compared to folks relatively at rest on Earth. We could actually travel rather quickly through space if we spared no expense on the spacecraft construction and employed a particle accelerator as an engine. The problem is that only the astronauts on the ship would think it was a quick trip because of relativity. Any significant distance traveled would equal a great deal of time having passed on Earth. The next biggest limitation is our economic system. Money! The way we choose to extract and distribute resources is so preposterously inefficient, we would hardly be able to raise enough money in one place to do even the most modest interstellar mission. The third limitation would have to be the actual strength itself of the best materials available to us to build the craft, as that would most assuredly put a "speed limit" on the craft, below what we would actually be able to attain were it not for the concern of the integrity of the craft itself.

Answer 4

If instead you are talking about the largest single object (rather than structure) then I expect it would be one of the supermassive black holes that you can find at the centre of some, perhaps most, galaxies.



For example, the giant elliptical galaxy M87 is estimated to have a black hole that contains 3 billion solar masses at it's center.





Possibly we could also include QSOs (quasi-stellar objects) which are thought to be an early stage of galactic development. I have no idea how large they are, but I estimate 'pretty darn big'. I don't believe that they currently exist in our universe, but we can see them, of course, because they are so bright and so far away that we are looking into the distant past when we observe them. Note that it is believed that the power source of a QSO is also a supermassive black hole at its centre.



Note that a black hole containing 3 billion solar masses has a radius that is approximately the size of our solar system. Quite big, then.

Answer 5

You live on a planet that goes around a star which orbits a galaxy that is grouped with other galaxies which are grouped into clusters which are grouped into superclusters that are grouped into sheets which are in the end merely the walls of bubbles, which are so numerous in existance that the whole thing looks like foam?

Answer 6

I'm not sure what the biggest object in space is, but I would guess a supermassive star.



I do know that it is NOT a black hole. Black Holes are infinently small, infinently dense objects, the auctal size of the hole itself is smaller than an atom.

Answer 7

Check this out....



By Ker Than, SPACE.com

An enormous amoeba-like structure 200 million light-years wide and made up of galaxies and large bubbles of gas is the largest known object in the universe, scientists say.





http://www.usatoday.com/tech/science/space/2006-07-27-biggest-blob_x.htm



Thats pretty out there, crazy stuff...

Answer 8

The universe.

Answer 9

Size comparison of various objects in space:

Answer 10

Your mother! lol Just kidding! A black hole can be 10^3 the mass of the Sun.

Answer 11

it's my butt. i'm not even kidding.



for real though, it's the lyman alpha blobs. they're 200 million lightyears wide and made up of galaxies and gas. look it up on google for more information.