are stars a light source?
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All stars produce light (and other kinds of energy) through nuclear reactions, using the energy stored in the tiny nucleus at the center of atoms. These reactions make the star so hot that it glows—it's like an enormous ball of fire, giving out light and heat.
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Natural light, which produces heat and color, comes from the radiation given off by the sun. ... Artificial light sources can consist of a filament that uses electricity or halogen gas to glow, or an electronic device that emits light. Some artificial lights use gas and electricity to produce light and heat.
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Planets are typically brighter than stars. The reason for differing brightness is because starts reflect the light of the sun, which is close to the planets, while the stars emit their own light. Regarding shape, stars appear as a dot while planets appear spherical. Generally, stars are also bigger than planets.
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with stars, they are not actually on fire. The heat and light are released by the chemical process of atoms joining together. This middle stage in the life cycle of a star is called the main sequence. As the hydrogen is used up, the star begins to fuse helium and heavier elements.
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The luminosity of a star, on the other hand, is the amount of light it emits from its surface. The difference between luminosity and apparent brightness depends on distance. ... So, everyone will measure a different apparent brightness for the same star if they are all different distances away from that star.
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The surface temperature of a star determines the color of light it emits. Blue stars are hotter than yellow stars, which are hotter than red stars.
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A star's brightness also depends on its proximity to us. The more distant an object is, the dimmer it appears. Therefore, if two stars have the same level of brightness, but one is farther away, the closer star will appear brighter than the more distant star - even though they are equally bright!
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Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
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-- there are a total of just over 9,000 stars that the human eye can discern. Every single one of them is contained within our own galaxy, though, so none of these are millions of light years away. There are some that are thousands of light years distant, though.
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In a nutsell, Stars are Hot body of mostly hydrogen and helium gases. They give off heat and light. The Sun is an example of A Star, whereas Constellation,when seen from Earth, is a group of stars that forms a shapes or pattern. Ursa major is an example of constellation.
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What are stars made of? Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.
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There actually are simple... The Sun is a star. Some stars are like the Sun. Stars reside in other galaxies as well as in ours (The Milky Way) .
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Stars and lightning are natural sources of radio waves, but these are also produced by the antenna on a radio transmitter. Many sources of electromagnetic radiation come from man-made technology. On the other side of the spectrum, we have ultraviolet radiation, which is emitted by black lights and fluorescent lamps.
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A "falling star" or a "shooting star" has nothing at all to do with a star! These amazing streaks of light you can sometimes see in the night sky are caused by tiny bits of dust and rock called meteoroids falling into the Earth's atmosphere and burning up.
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What are stars made of? Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements.
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Stars. A star is a sphere of gas held together by its own gravity. The closest star to Earth is our very own Sun, so we have an example nearby that astronomers can study in detail.
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They are luminous objects and non- luminous objects. Objects that emit light on their own are called luminous objects. Best examples of luminous objects are the sun, stars, light bulb etc. Objects that do not reflect light are known as non luminous objects.