What is the stars?

Answer 1

stars are hot ball of gases and dust twinkling in the sky. Our sun is also a star.

Answer 2

Here is some details about stars.....
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. Without stars, life and most atomic elements present in the Universe would not exist.

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, a star of at least 0.4 times the mass of the Sun expands to become a red giant, fusing heavier elements at the core, or in shells around the core. It 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 3

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. Without stars, life and most atomic elements present in the Universe would not exist.

Answer 4

Here`s an experiment you can try in order to find out . Buy or steal a 2 lb. ball peen hammer . Go home and settle into your easy chair ........ make yourself nice `n comfy .

Grab the hammer by the handle with the "ball" end facing you . Now give your right temple about 6 successive hard whacks .

See any stars ? ..... Not yet ?? ..... Increase the intensity of the blows to your head until they appear .

Answer 5

Stars are self luminous objects in space, like our sun. Some of them have planetary systems which could be detected from earth and from the orbiting telescopes. Stars were born billions of years ago and some are still being born and some have already died.

Answer 6

a. A self-luminous celestial body consisting of a mass of gas held together by its own gravity in which the energy generated by nuclear reactions in the interior is balanced by the outflow of energy to the surface, and the inward-directed gravitational forces are balanced by the outward-directed gas and radiation pressures.
b. Any of the celestial bodies visible at night from Earth as relatively stationary, usually twinkling points of light.
c. Something regarded as resembling such a celestial body.

Answer 7

Balls of hot gases that produce light.

Answer 8

those space objects which have their own light radiation

Answer 9

Planets or asteroids from galaxies away.