How big or I mean the mass of the biggest star in the Milky Way? (pls. help me)?

Answer 1

The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and 10,000,000 times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy. In 1995, it was suggested that the Pistol Star was so massive it was throwing off the mass that actually created the Pistol Nebula. Observations from the Hubble Space Telescope in 1997 confirmed the relationship between the star and the nebula. Astronomers are currently unsure how a star this massive could have formed or how it will act in the future
The star has enough raw power to blow off two expanding shells of gas equal to the mass of several times our Sun
astronomers estimate the Pistol Star still has a mass of 100 times that of our Sun
the sun mass is M ~ 2 x 10^30 kg
so the mass is around 2 10^32 kg.

Answer 2

Giant Heavenly Bodies

By James Anthony
Giant Stars

Astronomers have discovered a group of
stars that are up to 5 million times the
brightness of Sol, also called the Sun

Now we know space is big … actually really, really big. And our sun is a huge blazing ball of fiery gas that dwarfs every planet on our solar system.

But imagine a star - which is what the sun is - 1500 times bigger than our solar system-heating globe.

It's true. Scientists have discovered three new supergiant stars that are so big they are mind-boggling actually.

The new discoveries are KW Sagitarii (9800 lightyears away), V354 Cephei (9000 lightyears) and KY Cygni (5000 lightyears). They sound a bit like motorbikes, but rest assured, they have much more power!!

Each of the trio is 1500 times bigger than our sun and to put that into perspective, if one happened to be in our solar system it would stretch half-way from Jupiter to Saturn.

Answer 3

that substantial bulge is in basic terms an incredibly dense area of billions of stars which makes it glow so stunning - gravity pulls issues inwards it incredibly is why the centre of enormously plenty something (earth, solar, galaxies, regardless of) have a tendency to be greater dense than the outer areas - enormously with a great vast black hollow at its heart. opposite to what others are asserting, that stunning bulge isn't a black hollow in any different case it would be black and if it grow to be that substantial then there could be no milky way. The supermassive black hollow is someplace close to the middle of that substantial bulge of stars.

Answer 4

Our sun is huge!!! But guess what? it is only a medium sized Star. If that is medium, maybe the mass of biggest star will be really high!!!

Answer 5

The largest star present in our galaxy is a black hole called "Sagitarius A". The huge gravitational pull of this star is responsible for the stability of our galaxy.

Answer 6

Largest stars, diameters compared to solar diameter (sun = 1)

Star name Solar diameter (Sun = 1)
VV Cephei 1900
V354 Cephei 1520
KW Sagitarii 1460
KY Cygni 1420
Mu Cephei (Herschel's "Garnet Star") 1420
La Superba (Y Canum Venaticorum) 1100
S Doradus 1000
V509 Cassiopeiae 910
R Leonis 900 [1]
R Doradus 830
V838 Monocerotis 800
V382 Carinae 747
Rho Cassiopeiae 738
Mira A (Omicron Ceti) 700
Betelgeuse (Alpha Orionis) 650

VV Cephei is an eclipsing binary star system located in the constellation Cepheus. It contains a red supergiant and a companion blue star, which appears to be on the main sequence; matter flows from the supergiant onto the blue companion. VV Cephei A, the supergiant, is the largest star known. It is of spectral type M2. If it replaced the Sun in our solar system, it would extend to the orbit of Saturn. It is 315,000 times as luminous as the Sun.

VV Cephei B, the blue main sequence star, is separated from the larger star by a distance of 16 - 25 AU; it is a B0 star about 10 times the Sun's diameter and about 100,000 times its luminosity. The orbital period of the system is 7430 days (20.3 years). The eclipse lasts about 1300 days, and the midpoint of the last eclipse was in early January 1998.

V354 Cephei is a red supergiant star located within the Milky Way. It is located approximately 9,000 light-years away from our Sun and is the second largest known star.

KW Sagitarii is a red supergiant star located within the Milky Way. It is located approximately 9,800 light-years away from our Sun and is the third largest known star.

List of the heaviest stars Star name Solar Mass
Eta Carinae 150
Pistol Star 150
LBV 1806-20 130
VV Cephei 100
S Doradus 100
WR 20ab 80
R 66 70
R 126 30

Carinae (η Carinae or η Car) is a very large, very luminous star. Its luminosity is about four million times that of the Sun.

As of July 2006, Eta Carinae is the fifth most luminous star yet discovered, and along with the Pistol Star, is still the most massive. Stars that large are extraordinarily rare and it is thought that Eta Carinae approaches the theoretical upper limit of stellar mass.

The Pistol Star iis the most luminous star in the Milky Way galaxy, and is 10 million times as bright as the Sun.

The star unleashes as much energy in six seconds as the sun does in one year. It is located approximately 25,000 light years from Earth in the direction of Sagittarius, near the center of the Milky Way.

This star is so massive that its future fate cannot be determined for certain, but it is expected that the Pistol Star will die in a brilliant supernova or hypernova in 1 to 3 million years.

Astronomers estimate the star formed 1 to 3 million years ago and was originally as much as 200 times the mass of the Sun before it shed much of its mass in violent eruptions. The Pistol Star may have created the Pistol Nebula, which it illuminates, by ejecting mass under the pressure of its own light; it is thought to have ejected up to 10 solar masses of material in giant outbursts from its outer layers about 4,000 and 6,000 years ago. Its stellar wind is 10 billion times stronger than the Sun's. The size of Pistol Star brings into question current models about how stars are formed, possibly exceeding the current theoretical upper limit. It is possible that the Pistol Star's location near the galaxy's center is partly responsible for its large mass, since current evidence suggests that the star formation process there may favor massive stars.

LBV 1806-20 is a possible binary star located 30,000–49,000 light years from our Sun, toward the center of the galaxy. It has a total system mass of 130 Solar masses and a variable luminosity of 2 million to 10 million times that of the Sun, making it comparably luminous to Eta Carinae or the Pistol Star, contenders for the most luminous star (all of which are luminous blue variables).

Eddington’s Size Limit
Astronomers have long theorized that as a protostar grows, that if it exceeds 120 Solar masses, something drastic must happen. Although the limit can be stretched for very early Population III stars, if any stars existed above 120 solar mass, they would challenge current theories of stellar evolution.

The limit on mass arises because stars of greater mass have a higher rate of core energy generation, which is higher far out of proportion to their greater mass. For a sufficiently massive star, the outward pressure of radiant energy generated by nuclear fusion in the star’s core exceeds the inward pull of its own gravity. This is called the Eddington limit. Beyond this limit, a star ought to push itself apart, or at least shed enough mass to reduce its internal energy generation to a lower, maintainable rate. In theory, a more massive star could not hold itself together, because of the mass loss resulting from the outflow of stellar material.

Studying the Arches cluster, which is the densest known cluster of stars in our galaxy, astronomers have confirmed that stars in that cluster do not occur any larger than about 150 times the mass of our Sun.

Supermassive black holes
A supermassive black hole is a black hole with a mass in the range of a few times 10^5 to a few times 10^10 (hundreds of thousands to tens of billions) of solar masses. It is currently thought that most, if not all galaxies, including the Milky Way, contain a supermassive black hole at their galactic center.

So there is your answer. The most massive Main Sequence stars are bounded by the Eddington Limit and tend to shed their extra mass to keep an equilibrium between gravity and the rate of fusion, But supermassive black holes are not bounded by that upper limit and the Milky Way is believed to have one near the centre of the galaxy.

You learn something new every day!

Answer 7

http://content.scholastic.com/browse/article.jsp?id=4868

will anser all your questions

Answer 8

big