Looking up, what color of the universe has the fewest stars?

Upstairs, the answer must be wrong.

There are many red stars in the sky, and the first reaction is: Betelgeuse (Orion), Antares (Scorpio), and Mars.

There are also many white ones, the most well-known ones are Vega One (Lyra), Arcturus (Makuri) and many blue: the most well-known ones are Betelgeuse VII (Orion), Orion Ita (Chinese name forgot) There are very few green stars, and as far as I know, only Libra (Lyra) is visible to the naked eye, and a dark star in the constellation Microscope has a slightly green glow. It is estimated that the owners of these two constellations are not familiar with them, let alone these two stars.

The answer is d

d.Who has seen the green star.

Upstairs, according to what you said, the color of the universe as a whole is green, but the first star that people ask about is not the background color!

Sidestep the question.

I'll tell you the correct answer, choose C, the blue one.

Because the universe is expanding at an accelerated pace, all galaxies are accelerating away from us, so there is a redshift in the spectrum. So it's almost impossible to get a blue one.

d green minimal. The spectrum of a star is a continuum of absorption lines, and the star appears blue when the radiation peak is in the blue region, and the star appears reddish-orange when the radiation peak is in the red-orange region. When the peak radiation is in the green region, the star has strong radiation throughout the visible band, so it appears white.

So the green stars are the least.

dWith the increase of surface temperature, the color of stars is in the following order: red-orange-yellow-white-white-white-blue-white-blue-blue.

Both upstairs were wrong. The color of the universe as a whole is green, and D is chosen for design

d Because green stars are rarely seen from the ground.

The brightest planet is not the largest, it may be the closest to our Earth, and their brightness can be divided by the eyes.

The brightest star is not the largest, the brightness of the star is determined by its distance from the earth and the size of the star.

Not necessarily, it has to do with distance, if a very bright star is far away, then when we observe it with the naked eye, it will be darker, but when a fainter star is close to us, it will be brighter. The brightness of a star is divided by magnitude.