On Earth something red and hot means it's close; in Astronomy red means distant and cool. Why?

On Earth something red and hot means it's close; in Astronomy red means distant and cool. Why? Is that correct or am I wrong?

Asked by goldie080 48 months ago Similar questions: Earth red hot means close Astronomy distant cool Science > Space & Astronomy.

Similar questions: Earth red hot means close Astronomy distant cool.

A couple of things... First, let me address the items that we encounter in everyday life: these things do not emit visible light or a differential in heat because they typically are sitting at ambient temperature, regulated by the air around them. Plates, glasses, leftovers, etc. When something has energy applied to it, such as a light bulb or a stove's burner, it heats up and begins producing visible light as a by-product of that heat once it reaches a certain point.(All objects other than those at absolute zero produce light as a by-product of their temperature but most of it falls outside of the visible light spectrum.) The hotter something becomes, the farther it moves from infrared, which is not viewable without special equipment, to visible light (beginning with the deep red color on a stove, for example) and finally into the ultraviolet range which also, of course, is not visible to the naked eye. Thus, by comparison, something that is "red hot" is hot to us based on our everyday experiences.

However, in the grand range of temperature, it is quite "cool." Now as far as astronomy, what you are discussing is Doppler shift. This is a principle in which the change in the frequency of light helps to determine distance a fixed point at a specific time from as well as change in speed, distance, and direction over an extended time of observation.

When something is moving away from us, the experience is called redshift because the frequency of the light is dropping. When it is approaching, it is said to be a blueshift because the frequency of the light is increasing. Redshift and blueshift have to do with the general regions of the electromagnetic spectrum: infrared and ultraviolet.

The names only indicate directions, not necessarily the viewable colors of the observed astronomical phenomena. A great example would be a comet flying through space. A comet is primarily a big chunk of ice.

As such, it would not be emitting any light itself but it can cause redshift or blueshift of light it reflects, depending on the direction of the source of that light. Now something else to keep in mind, if you are concerned about something such as a proximity "radar" screen that one might see in the movies in a security booth. Those blips they show can start to glow red as a person draws near whatever is being protected.

This red shading of the approaching entity is arbitrary and has nothing to do with science.It is only a highlight to draw attention to that object so the guards notice it more easily and respond appropriately. I hope all this helps! If you have any questions or need clarification on this, let me know.

Sources: Nearly 30 years of interest in the sciences, both academically and independently .

Um...you're wrong. In terms of heat, red is relatively cool no matter where you are. Hot is white or blue white whether it’s a piece of steel in a furnace or a star.In neither case does it have anything to do with distance.

Color is a function of the wavelength of the light: low energy, long wave length light appears red, high energy, short wavelengths are white. There are red stars close by and white stars much father away. The brightest star in our sky is Sirius, a blue white binary that is only 8.6 light years away which, in galactic terms, is just down the block.

Two of the closest stars to our sun are Proxima Centauri and Barnard's Star, both Red Dwarf stars.

Hot", "close", "distant", and "cool" are all relative terms Distance and heat in space are a heck of lot bigger and space than they are here on our tiny little planet. A star that shines Red is the coldest type of star. A yellow star (like ours) is warmer than a red.

A white star is hotter still. And a blue star is the hottest of all. But that doesn't mean that a red star is "cold", just colder than any other star.It's still a huge ball of burning gasses, about 3,500° Kelvin.

Even here on earth, metals which become hot first get red, and but if you continue to heat them, they turn white. Thus, "white hot" is a term meaning roughly "as hot as possible" (actually, if you continue to heat them, they'll eventually turn blue as well). It's just that "red hot" is more common because red is more readily associated with heat, since the vast majority of people who aren't chemists or physicists have any reason to heat a piece of metal to white-hot levels.

Sources: en.wikipedia.org/wiki/Blackbody_radiation .

Red indicates low mass stars that were never hot to begin with. They emit cool radiation which is reddish. Relevant Link: curious.astro.cornell.edu/question.php?n... Sources: Cornell .

I think you are mixing descriptions. Red always means hot... whether it's a stove burner, a cigarette, or a red dwarf star. However, there are hotter things: yellow incandescent bulb, a white halogen bulb, and a blue oxyacetylene flame.

The second that seems to be mixed in with this is red shift/blue shift. This has to do with the wavelength of light. It is basically the same concept as when a car or airplane passes... best demonstrated with a siren or horn.

When it is approaching, it makes a higher pitched sound, and when it is going away the sound becomes lower pitched. This is because the fast moving vehicle is either compressing or stretching the sound waves. Similarly, a fast moving star will compress or stretch light waves, making its light appear bluer than normal (approaching) or redder than normal (going away) so in astronomy, red means cool only in relation to hotter things... it's still pretty hot.

And red means getting farther away. Clear as mud? .

I am looking for a particular science/math/astronomy paperback book with red stripes on a white background.

Whenever you see a program that focuses on astronomy, the beauty of distant nebula and galaxies...

On Earth something red and hot means it's close; in Astronomy red means distant and cool. Why? Is that correct or am I wrong?

Asked by goldie080 51 months ago Similar Questions: Earth red hot means close Astronomy distant cool Recent Questions About: Earth red hot means close Astronomy distant cool Science > Space & Astronomy.

Similar Questions: Earth red hot means close Astronomy distant cool Recent Questions About: Earth red hot means close Astronomy distant cool.

A couple of things... First, let me address the items that we encounter in everyday life: these things do not emit visible light or a differential in heat because they typically are sitting at ambient temperature, regulated by the air around them. Plates, glasses, leftovers, etc. When something has energy applied to it, such as a light bulb or a stove's burner, it heats up and begins producing visible light as a by-product of that heat once it reaches a certain point. (All objects other than those at absolute zero produce light as a by-product of their temperature but most of it falls outside of the visible light spectrum.

) The hotter something becomes, the farther it moves from infrared, which is not viewable without special equipment, to visible light (beginning with the deep red color on a stove, for example) and finally into the ultraviolet range which also, of course, is not visible to the naked eye. Thus, by comparison, something that is "red hot" is hot to us based on our everyday experiences. However, in the grand range of temperature, it is quite "cool.

" Now as far as astronomy, what you are discussing is Doppler shift. This is a principle in which the change in the frequency of light helps to determine distance a fixed point at a specific time from as well as change in speed, distance, and direction over an extended time of observation. When something is moving away from us, the experience is called redshift because the frequency of the light is dropping.

When it is approaching, it is said to be a blueshift because the frequency of the light is increasing. Redshift and blueshift have to do with the general regions of the electromagnetic spectrum: infrared and ultraviolet. The names only indicate directions, not necessarily the viewable colors of the observed astronomical phenomena.

A great example would be a comet flying through space. A comet is primarily a big chunk of ice. As such, it would not be emitting any light itself but it can cause redshift or blueshift of light it reflects, depending on the direction of the source of that light.

Now something else to keep in mind, if you are concerned about something such as a proximity "radar" screen that one might see in the movies in a security booth. Those blips they show can start to glow red as a person draws near whatever is being protected. This red shading of the approaching entity is arbitrary and has nothing to do with science.

It is only a highlight to draw attention to that object so the guards notice it more easily and respond appropriately. I hope all this helps! If you have any questions or need clarification on this, let me know.

Sources: Nearly 30 years of interest in the sciences, both academically and independently .

Um...you're wrong. In terms of heat, red is relatively cool no matter where you are. Hot is white or blue white whether it’s a piece of steel in a furnace or a star.

In neither case does it have anything to do with distance. Color is a function of the wavelength of the light: low energy, long wave length light appears red, high energy, short wavelengths are white. There are red stars close by and white stars much father away.

The brightest star in our sky is Sirius, a blue white binary that is only 8.6 light years away which, in galactic terms, is just down the block. Two of the closest stars to our sun are Proxima Centauri and Barnard's Star, both Red Dwarf stars.

Hot", "close", "distant", and "cool" are all relative terms Distance and heat in space are a heck of lot bigger and space than they are here on our tiny little planet. A star that shines Red is the coldest type of star. A yellow star (like ours) is warmer than a red.

A white star is hotter still. And a blue star is the hottest of all. But that doesn't mean that a red star is "cold", just colder than any other star.

It's still a huge ball of burning gasses, about 3,500° Kelvin. Even here on earth, metals which become hot first get red, and but if you continue to heat them, they turn white. Thus, "white hot" is a term meaning roughly "as hot as possible" (actually, if you continue to heat them, they'll eventually turn blue as well).

It's just that "red hot" is more common because red is more readily associated with heat, since the vast majority of people who aren't chemists or physicists have any reason to heat a piece of metal to white-hot levels. Sources: en.wikipedia.org/wiki/Blackbody_radiation .

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.