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  1. Dictionary
    blue-sky
    /ˈblo͞oˌskī/

    adjective

    • 1. not yet practical or profitable: informal "blue-sky research"

    verb

    • 1. make impractical or as yet unachievable plans.

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    More definitions, origin and scrabble points

  2. www.uprtek.com › en › blogsMoms & Dads: Why is the Sky Blue? | UPRtek

    1 day ago · The blue colors scatter in the sky in all directions because they hit particles in the atmosphere (e.g., Oxygen, Nitrogen). Some of that scattered blue color reaches our eyes and makes the sky appear blue. Other colors (red, green, etc.) don’t scatter as well because they have longer wavelengths. And that’s why the sky is blue.

  3. www.britannica.com › science › blue-colorBlue | Description, Etymology, & Facts | Britannica

    Jul 5, 2024 · Blue, in physics, light in the wavelength range of 450–495 nanometers in the visible spectrum. In art, blue is a color on the conventional wheel, located between green and violet and opposite orange, its complement.

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  5. spaceplace.nasa.gov › blue-sky › redirectedWhy Is the Sky Blue? | NASA Space Place – NASA Science for Kids

    Jul 9, 2024 · Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white.

  6. www.youtube.com › watchWHY IS THE SKY BLUE? The science behind why the sky is blue.

    Jul 16, 2024 · Have you ever wondered why the sky appears blue? In this video, we explore the fascinating science behind the color of the sky and explain the phenomenon of ...

  7. www.britannica.com › science › star-astronomyStar | Definition, Light, Names, & Facts | Britannica

    4 days ago · The highly luminous hot, blue stars have by far the strongest stellar winds. Observations of their ultraviolet spectra with telescopes on sounding rockets and spacecraft have shown that their wind speeds often reach 3,000 km (roughly 2,000 miles) per second, while losing mass at rates up to a billion times that of the solar wind.

  8. www.rochesterfirst.com › news › why-is-the-sky-blueWhy is the sky blue? - RochesterFirst

    5 days ago · Let’s break it down. The short answer is that when sunlight reach the earth’s atmosphere, it is scattered in all different directions by gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

  9. star-planete.net › why-is-the-sky-blue-23Why is the Sky Blue? » star-planete.net

    The sky is blue due to light rays passing through Earth's atmosphere and being scattered by air molecules; light at the blue end of the spectrum tends to be dispersed more strongly than other colors.Air molecules are smaller than visible light wavelengths, so they scatter shorter wavelengths such as violet more readily than longer ones