Difference between star and planet

What is the Difference Between a Star and a Planet?

difference between star and planet

Jul 18, Stars do this; planets don't. In order to have high enough temperatures in the core to burn hydrogen, an object needs to have a mass of at least.

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How could the early astronomers without telescopes be sure to tell the difference between planets and stars if even today, when I look at the night sky I cannot tell which is which? Early astronomers were able to tell the difference between planets and stars because planets in our Solar System appear to move in complicated paths across the sky, but stars don't. That is, if you observe the sky night after night, the stars will all appear in fixed positions with respect to each other. They will rise and set a few minutes earlier each night an effect that is due to the Earth's motion around the Sun , but otherwise nothing will change. This is why the background stars are sometimes referred to as the "celestial sphere" -- from our point of view, it looks like the stars are "painted" onto a gigantic sphere that surrounds Earth and therefore are unable to move with respect to each other.

At night, when you look up high in the sky, you will notice trillions of shining dots, out of which some appear brighter, some are bigger while some of them twinkle. It is a point to ponder, what are these bright dots? So they are nothing but stars and planets. Stars are heavenly bodies that possess their own light and twinkle. They are fixed and large luminous body like the Sun. On the flip side, planets are celestial objects, which have an apparent motion of their own and also moves around the star, in an elliptical orbit. Basis for Comparison Stars Planets Meaning Stars are the astronomical objects, that emit their own light, produced due to thermonuclear fusion, occurring at its core.

Show less The night sky is full of light, most of which is generated by celestial bodies like stars and planets. If you can't tell whether an object in the sky is a star or planet, you'll want to learn how to distinguish between the physical features of these two celestial bodies, and when it's best to view them. The simplest way to differentiate between planets and stars is by observing whether the object is twinkling or if it remains bright. Stars twinkle, while planets are brighter and do not shimmer.

Stars do this; planets don't. In order to have high enough temperatures in the core to burn hydrogen, an object needs to have a mass of at least 75 or so times that of Jupiter. Anything more massive than that is automatically considered a star. Stars form when a cloud of gas, out in a nebula or other region of interstellar space, collapses under the influence of gravity. There is actually some ambiguity in the above definitions, mainly because of the existence of objects called "brown dwarfs". Brown dwarfs are too small to burn hydrogen, so they can't be considered stars, but most of them seem to form in the same way that stars do, often out on their own in a cloud of interstellar gas, so they can't really be considered planets either.

First, let's talk about stars and planets. Stars are balls of gas that are so massive that the pressure inside of them causes a nuclear reaction. That makes them bright and hot like the sun, sometimes even hotter. Planets can vary a bit, and I don't know the exact definition. Planets like the earth and Mars are rocky with a metallic center -- in other words, they're solid. But planets like Jupiter and Saturn are mostly gas, like a star.



Difference Between Stars and Planets

During the night, the sky is filled with tiny dots that appear to be glowing. - We have made every effort to follow citation style rules, but there may be some minor differences. If in doubt, please refer to the appropriate citation style manual.

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