how many stars are in universe?

Question

planets

Answer 1

8976645546647748875657758859000 ....and counting !! ( I don't suppose you can challenge this figure ...Can you ?? ) Ha Ha

Answer 2

A lot more that one could ever count. The Universe is in a continous expansion. New Stars are born every minute and others die. There is no certain way of nowing exactly how many stars there are. The stars you see when you look up to the sky on a clear skyed night might even be dead alreay, but they're so far away, that the light from them has just got here.

Hope this helped!
~Reddo

Answer 3

http://www.cnn.com/2003/TECH/space/07/22/stars.survey/

That's the total number of stars in the known universe, according to a study by Australian astronomers.

It's also about 10 times as many stars as grains of sand on all the world's beaches and deserts.

The figure -- 7 followed by 22 zeros or, more accurately, 70 sextillion -- was calculated by a team of stargazers based at the Australian National University.

Answer 4

A star is a massive, luminous ball of plasma. Stars group together to form galaxies, and they dominate the visible universe. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth, including daylight. Other stars are visible in the night sky, when they are not outshone by the Sun. A star shines because nuclear fusion in its core releases energy which traverses the star's interior and then radiates into outer space. Almost all elements heavier than hydrogen and helium were created inside the cores of stars.

Astronomers can determine the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity and motion through space. The total mass of a star is the principal determinant in its evolution and eventual fate. Other characteristics of a star that are determined by its evolutionary history include the diameter, rotation, movement and temperature. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung-Russell diagram (H-R diagram), allows the current age and evolutionary state of a particular star to be determined.

A star begins as a collapsing cloud of material that is composed primarily of hydrogen along with some helium and heavier trace elements. Once the stellar core is sufficiently dense, some of the hydrogen is steadily converted into helium through the process of nuclear fusion. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. These processes keep the star from collapsing upon itself and the energy generates a stellar wind at the surface and radiation into outer space.

Once the hydrogen fuel at the core is exhausted, those stars having at least 0.4 times the mass of the Sun expand to become a red giant, fusing heavier elements at the core, or in shells around the core. The star then evolves into a degenerate form, recycling a portion of the matter into the interstellar environment, where it will form a new generation of stars with a higher proportion of heavy elements.

Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution.

Answer 5

Astronomers announced today that there are 70 sextillion stars in the visible universe, or some 70 thousand million million million. That's a 7 followed by 22 zeros.

Answer 6

Let's see, Liz Taylor, Judy Garland, Betty Davis, wow! that's a lot...

Answer 7

10 to the power 22
Asked in a Tenth Public exam about two years ago I think

Answer 8

Billions and Billions (according to Carl Sagan)

Answer 9

It is said that in one look we can see approx 10 million stars from our eyes. There are uncountable stars.

Answer 10

Hmm.. that's like asking how many grains of sand are in the desert, or how many droplets of water make up the seas.. and so forth, so forth.

Answer 11

For ever single grain of sand on every beach and in every desert in the world, there is a star in the cosmos.