What is this rapidly twinkling red, blue, and white star I saw?
WEBOct 28, 2017 · There are two sets of binary pairs that are almost exactly along the same line of sight such that the light from the four stars together co-mingles and from Earth looks like a single star. Interestingly, the different stars have different colors, meaning that as you stare at it, it can appear white, red, or blue, just as you described.
What is this, red, blue, white twinkling, star? [duplicate]
WEBMar 27, 2022 · 20. The star is most likely Vega. It doesn't actually twinkle, the technical term for this is "scintillation", and is purely an atmospheric effect. The general idea is that stars are so far away, they are infinitesimally small points of light.
Why are blue stars the hottest? - Astronomy Stack Exchange
WEB1. Our eyes and brains make them blue. Stars are (close to) a black body, they emit a broad band of radiation. The hottest stars will emit most of their radiation in the ultraviolet but they will still be very bright in visible light. As they get hotter, they emit even more ultraviolet, and more visible light but the mixture of wavelengths in ...
What is visible light colour output of different stars?
WEBApr 29, 2014 · Apr 30, 2014 at 0:04. @simontemplar The available visible colours correspond to the spectrum of the stars. Stars looking red have almost no green or blue light in their spectrum, hence all objects in this kind of light look either red or black. Whitish stars provide all colors. Bluish stars also, but red-toned objects look darker and more ...
The colour of blue dwarf stars - Astronomy Stack Exchange
WEB10. The paper "M dwarfs: planet formation and long term evolution" describes blue dwarf stars, a hypothetical next-stage in the lifespan of red dwarf stars within a certain mass range, after which they become white dwarves. (Hypothetical because the universe is not old enough for any red dwarves to have reached this stage.)
Why don't we see purple stars - Astronomy Stack Exchange
WEBNov 21, 2018 · 1. Purple and green star exists. For example, a blue supergiant star can have its surface temperature to 50000 K, which peaks at purple in the blackbody spectrum. However, our eyes are more sensitive to blue than purple, and the contrast between blue and purple in the spectrum is insignificant, therefore we see blue.
Is a white dwarf hotter than a Red Giant? - star
WEBAug 10, 2014 · Red giants are (on the surface) typically below 5000 K. Their core is up to a billion degrees Kelvin. This might be an interesting link too. As a final note: white dwarfs are the end stage of a star's life. Depending on the mass of the star, red giants can end up as white dwarfs. About 97% of the milky way stars will end as white dwarfs ...
Why are there no green stars? - Astronomy Stack Exchange
WEBAug 31, 2020 · As one varies the temperature, the color of a star should make a one-dimensional curve in this color space. Thus, unless some perverse shenanigans are going on, it is intuitive that we necessarily miss most of colors, i.e. there will be no stars of those colors. Our Sun actually has a peak at about 500nm 500 n m, which is a green.
How do K, F, A and B stars die? - Astronomy Stack Exchange
WEBApr 1, 2020 · The corresponding remnant white dwarf mass will increase up to about ∼ 1.2M⊙ ∼ 1.2 M ⊙ - which are the most massive white dwarfs produced via normal, single-star evolution. All these stars will go through a "first ascent" red giant phase, He core burning and asymptotic giant branch phases. Above an intial 8M⊙ 8 M ⊙, then carbon ...
If Sunlike stars become a red giant and eventually a white dwarf, …
WEBAug 14, 2020 · A discussion of the appearance of the blue dwarf stage and how blue they actually are can be found in this question. The $0.16 \le M_\ast / M_\odot \le 0.20$ range is transitional between the stars that become blue dwarfs and the stars that become red giants. From the paper: