what is a star and how does it look from outside the earth?

Question

if we look the star from moon how does it look likes.same like

in the earth or it would be more closer.

Answer 1

A star is a big ball of gas.

Answer 2

A star is a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior of the star. A star will look the same outside of the earth as it does inside the earth. Take the sun for example, how would it look if you weren't on earth? The same (unless you were spiraling into it, in which case I believe it would look al lot like death).

Answer 3

a star is a giant ball of gaseous matter. It would look much the same out side of earth...but if you got too close, it would pull you into its orbit and burn you up. if you looked at a star from the moon, it would look much the same. the closest star to earth (other than our sun) is really for away, millions of light years. the moon is not even a lightyear away, so a star would look the same.

Answer 4

The sun would look different for the reasons mentioned. Also because the atomosphere doesn't absorb likely across the spectrum equally. Hence the red hues at sunset due to more atmosphere to penitrate. The short answer is the sun appears white.

Answer 5

a star is a ball of gas and it would just look like a bigger dot if the earth was closer to another star

Answer 6

It wouldn't twinkle from the moon though, but other than that , it's the same appearance. The moon is 200,000 miles away. The nearest star is 24,000,000,000 miles away so it's not a big diff if u go to moon.

Answer 7

A star is red when it dies and blue when is is being born in the gas dust cloud. When we see the stars we see a Damien or circle shape thing in the sky.

Answer 8

you would not really notice how much closer it is,but it would be brighter because the moon has no atmoshere.And when you are not in view of the sun you would see alot more stars.

star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. The most familiar and closest star to the Earth is the Sun. Unlike a planet, from which most light is reflected, a star emits light because of its intense heat. Scientifically, stars are defined as self-gravitating spheres of plasma in hydrostatic equilibrium, which generate their own energy through the process of nuclear fusion. Stellar astronomy is the study of stars.

A Hertzsprung-Russell diagram shows the pattern of the temperature of stars against their absolute magnitude.

Star formation occurs in molecular clouds, large regions of high density in the interstellar medium (though still less dense than the inside of an earthly vacuum chamber). Star formation begins with gravitational instability inside those clouds, often triggered by shockwaves from supernovae or the collision of two galaxies (as in a starburst galaxy). High mass stars powerfully illuminate the clouds from which they formed. One example of such a nebula is the Orion Nebula.

Stars spend about 90% of their lifetime fusing hydrogen to produce helium in high-temperature and high-pressure reactions near the core. Such stars are said to be on the main sequence.

Small stars (called red dwarfs) burn their fuel very slowly and last tens to hundreds of billions of years. At the end of their lives, they simply become dimmer and dimmer, fading into black dwarfs. However, since the lifespan of such stars is greater than the current age of the universe (13.7 billion years), no black dwarfs exist yet.

As most stars exhaust their supply of hydrogen, their outer layers expand and cool to form a red giant. In about 5 billion years, when the Sun is a red giant, it will be so large that it will consume both Mercury and Venus. Eventually the core is compressed enough to start helium fusion, and the star heats up and contracts. Larger stars will also fuse heavier elements, all the way to iron, which is the end point of the process. Since iron nuclei are more tightly bound than any heavier nuclei, they cannot be fused to release energy - the process would consume energy. Likewise, since they are more tightly bound than all lighter nuclei, energy cannot be released by fission. In old, very massive stars, a large core of inert iron will accumulate in the center of the star.

An average-size star (<1.4 solar masses after explosion) will then shed its outer layers as a planetary nebula. The core that remains will be a tiny ball of degenerate matter not massive enough for further fusion to take place, supported only by degeneracy pressure, called a white dwarf. These too will fade into brown, and then black dwarfs over a very long stretch of time.


The Crab Nebula, remnants of a supernova which occurred around 1050 AD.In larger stars, defined as >1.4 solar masses after explosion, fusion continues until an iron core accumulates that is too large to be supported by electron degeneracy pressure. This core will suddenly collapse as its electrons are driven into its protons, forming neutrons and neutrinos in a burst of inverse beta decay. The shockwave formed by this sudden collapse causes the rest of the star to explode in a supernova. Supernovae are so bright that they may briefly outshine the star's entire home galaxy. When they occur within the Milky Way, supernovae have historically been observed by naked-eye observers as "new stars" where none existed before. Eventually, most of the matter in a star is blown away by the explosion (forming nebulae such as the Crab Nebula) and what remains will be a neutron star (sometimes a pulsar or X-ray burster) or, in the case of the largest stars (>3 solar masses after explosion), a black hole.

The blown-off outer layers of dying stars include heavy elements which may be recycled during new star formation. These heavy elements allow the formation of rocky planets. The outflow from supernovae and the stellar wind of large stars play an important part in shaping the interstellar medium.

Answer 9

It wouldn't look any closer, but without the earth's atmosphere to interfere with the view you would see it more clearly.

Answer 10

stars are like the sun-they can be stronger or weaker (red,yellow,or blue i think...) the brightness of each star depends on how close you are and on the size.