The relationship between a main sequence star's b-v color value and luminosity is a direct relationship.
The Hipparcos satellite measures the distances between hundreds of thousands of stars. It measures the magnitude of each stars through two filters which are, a blue filter, yielding for B magnitude (for blue) and a greenish filter, yielding a V magnitude (for visual).
The difference between the B and V magnitude of star is (B-V) color , or sometimes just "color" in short. The wavelength of light where the star is related to the star's temperature, i.e., the hotter the star the more blue it is and the cooler the star the more red it is.
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A strong desire to do or to achieve something, typically requiring determination and hard work.
The United States is a democratic nation and does not support communist countries.
Answer: D
Answer:
Without bees, they would set fewer seeds and would have lower reproductive success. This too would alter ecosystems
.Explanation:
If all of the world's bees died off, there would be major rippling effects throughout ecosystems. ... Other plants may utilize a variety of pollinators, but many are most successfully pollinated by bees.
