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Some stars are so far away will these sources of the light that reaches us will be the same?
Wiki User
∙ 14y ago
Invariably not. Even our own Sun is about 8.3 minutes older than the light we see. So if the Sun suddenly exploded, we would not know for 8.3 minutes.
Likewise with the stars. Alpha Centauri A is 4.3 years older than the light we see, whereas Betelgeuse is 640 years older than the light we see. In fact Betelgeuse may have exploded 500 years ago, but we will have to wait another 140 year before we find out.
Some stars are so far away, that in all probability, they are no longer there, but we still see the light that they emitted eons ago.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoThe light from far away stars will not be the same when it reaches Earth because light bends. This will distort the light and make them different when they reach Earth.
Wiki User
∙ 11y agoYes, but the closest star is Proxima Centauri, which is about 4.2 lightyears away. That means that that star takes about 4.2 years for light to reach earth.
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When you look up at the stars are they really present at that place or are they somewhere else as the light from them reaches us in many light years?
They have move, but not necessarily by much. The stars that are visible to the naked eye are generally within a few hundred light years of Earth, and some are only a few light years away. So you see those stars as they were, at most, a few hundred years ago, which, to a star, is a very short time. During that time, the star's position relative to Earth will not have changed significantly. For a star to be millions of miles away as some claim they are. it would have to be in an entirely different galaxy. If you were to observe the Andromeda Galaxy through a telescope, you would see it as it was 2.5 million years ago. Since then, the stars in it will have moved, but most will still exist as most stars last for billions of years, not just millions.
What are some examples of natural resources of light?
Daylight, sunlight and skylight or all natural sources of light.
How many planets does the sun's light reach?
The Sun's light reaches all of the planets in our Solar system. We see them only because they reflect some of the Sun's light.
Why do glow-in-the-dark things stop glowing after some time?
When things that are supposed to glow in the dark don't, it is usually because they were not exposed to other sources of light. For example, glow stars only glow if the light in the room they decorate has been on for sometime, in a kind of absorbtion process. Without previous contact with a light source they can't glow.
Why is it important to know how long light takes to reach the Earth?
Since light travels at a known speed and changes in frequency as it travels, it provides a way of measuring the distance to faraway stellar objects (stars, galaxies). This provides important clues to the structure of the universe. To the naked eye, dim nearer objects (asteroids, planets, stars) look the same as bright faraway ones (galaxies). Some distant stars and galaxies whose light reaches the Earth today no longer exist, at least not in the form they had when the light was emitted, many millions of years ago. As for the light from the Sun, its 8-minute travel time to Earth is an interesting concept, but has little bearing on how the Sun affects the Earth.
What are some Sources of light energy?
The Sun, Stars, Light Bulbs, Fires, Fluorescent Lamps
What are common sources of light?
Some common sources of light are celestial light (stars/the sun), oil, gas, fire, and bioluminescent objects.
What are some everyday sources of light?
The sun, bio luminescent aquatic creatures found near the bottom of the ocean where little to no sunligh reaches.
Why does the moon get light from the sun rather than other stars?
The amount of light that reaches our solar system from stars other than the sun is very small becuase they are so distant. Technically, light from some those stars does relflect off the moon, but the amount is far too small for us to see.
Did some of the stars of the little dipper burn out?
No. It is a common misconception that the stars we see at night have burnt out by the time their light reaches us. In truth, all stars visible to the naked eye are within a few hundred light years of us. So we see those stars as they were, at most, a few hundred years ago. Such a time period is not even a blink of an eye in the life of a star.
Why can you see stars and planets in the night sky?
You see stars because nuclear fusion is going on inside them, generating huge amounts of energy, and some of it leaves the star in the form of visible light. In other words, stars make their own light, and they are sources of light. You see planets, moons, and anything else in the sky, because the sun shines on them and lights them up, like a flashlight.
When light from a star reaches earth is the star still there?
Yes. It is a common misconception that the light from a star takes millions of years to reach Earth, and that the star is dead by the time the light reaches us. This is false for two reasons. First, most of the stars you can see with the naked eye are no more than a few hundred light years away and some are less than 10 light years away, so the light we see from them was emitted hundreds of years ago at most, not millions. No star in this galaxy is more than about 75,000 light years away. Second, for most stars, a few million years is a fairly short time. Most stars last for billions of years.
What are examples of secondary light sources in a home?
Some examples of secondary light sources in a home include:lampsrecessed lightingnight lights
What is the sun most responsible in producing?
Heat!!!!!! While the sun does produce a lot of heat, none of it reaches Earth. What reaches Earth is electromagnetic energy (light). Some of this light is converted to heat here on Earth, such as some of the light that hits your skin.
When looking at stars you are actually seeing how the universe looked many years ago?
The quick answer is yes. The light that reaches takes million if not billions of years in some cases to reach us. Some only a few year to a few hundred. Some of the stars you see in the night sky are already dead, it just takes time to get here.
What re some natural light sources?
starsfireflieslightningfire
What are some objects that produce light and heat?
Stars.
