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The main difference is that a star emits its own energy, which it converts through nuclear fusion; a planet does not. As a result, you can expect a star to have a surface that's quite a bit hotter than that of a planet. What an object is depends, to a great extent, on its mass; objects up to about 13 times the mass of Jupiter would be planets (or planet-like object - if they don't orbit a star, they won't be called a planet!), objects more massive than that would be called "brown dwarves" - these can fuse deuterium, but don't get hot enough to fuse normal hydrogen (hydrogen-1), and objects with more than about 0.075 times the mass of our Sun would be a star proper (a red dwarf, for the less massive ones). A star is an object able to fuse hydrogen-1.
Wiki User
∙ 10y ago
Wiki User
∙ 9y agoPlanets tend to be brighter (although not always).
They also do not appear to twinkle, except when close to the horizon.
The only sure way to tell is that stars don't move in relation to each other over a period of a few years.
Wiki User
∙ 14y agoIf you're asking how can you tell if a given point of light in the sky is a planet or a star, then watch it for a few nights. If it moves relative to the other stars, it's a planet (or, possibly, a comet); otherwise it's a star. If you don't want to wait, look it up on a star chart (and see if there's a star at that position) or an ephemeris table (and see if there's supposed to be a planet there at that particular time).
Wiki User
∙ 12y agoThe star spins off matters and gases to form the planets, which circle the star. The star is an active nuclear reactor providing light and energy to surrounding planets. A star and its planets form a star system, like our solar system; all star systems in the galaxy spin around the enormous black hole at the center of the galaxy. A star is bigger and more massive than any one of its planets.
Wiki User
∙ 12y agoFrom earth, the planets will move relative to the background. The stars will stay fixed, they will always appear the same, only moving as the earth rotates.
Wiki User
∙ 13y agoThe easiest way to tell from simply looking up into the sky is that stars "twinkle" and planets don't.
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How can you tell something is a planet and not a moon?
A planet is in direct orbit around a central star, while a moon is in orbit around a large body (a planet) rather than in a direct orbit around a star. The moon orbits the planet, while the planet orbits the sun.
What is a persons ability to tell the difference between artificial smells and real smells?
Well, there really isn't a term for that. Though you CAN tell the difference between a lot of smells, you can't really tell much difference between the two unless you have some familiarity with them.
Can you tell the difference between 305 and 350 by where the timing tabs are?
no
What does the Doppler affect tell astronomers about a star?
The star attracts the planet; the planet attracts the star. As a result of the latter, the star changes position. If this change is such that the star moves away from us during one part of the planet's orbit, and towards us at another (or more generally, the star's speed towards us, or away from us, changes slightly), then this can be detected as a Doppler shift.
Can a human tell the difference between artificial and natural flavors?
maybe
How can you tell the difference between a comet and a star?
a comet has tail behind it while a star is like a little dot.
Tell me is there a planet called Mygeeto?
In Star Wars,yes.
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How can you tell a planet from a star in the night sky?
Since a planet's light is reflected it appears to be steady (non twinkling). Star light twinkles.
How can you tell something is a planet and not a star?
It is much larger, brighter and more colourful.
How can you tell the difference beetween a star and a commet?
a star doesn't move and a comet has a tail
Why start twinkle in the sky at night give scientific reason?
Stars are basically balls of pulsating light so they create "waves" causing it to look like it's blinking on and off. You can tell the difference between a star and a planet by watching to see if it's blinking or not.
How can you tell something is a planet and not a moon?
A planet is in direct orbit around a central star, while a moon is in orbit around a large body (a planet) rather than in a direct orbit around a star. The moon orbits the planet, while the planet orbits the sun.
How can you tell wheather a bright object in the night sky is a star or a planet?
We can usually distinguish them. If it's twinkling then its a star. If it's not twinkling then it's a planet, unless it's a star that's very high in the sky.
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