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- Dictionaryluminosity/ˌluːmɪˈnɒsɪti/
noun
- 1. luminous quality: "acrylic colours retain freshness and luminosity"
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3 days ago · The luminosity of the Sun is about 3.86 x 10 26 watts. This is the total power radiated out into space by the Sun. Most of this radiation is in the visible and infrared part of the electromagnetic spectrum, with less than 1% emitted in the radio, UV and X-ray spectral bands. The Sun's energy is radiated uniformly in all directions.
4 days ago · Luminosity class 0 or Ia+ is used for hypergiants, class I for supergiants, class II for bright giants, class III for regular giants, class IV for subgiants, class V for main-sequence stars, class sd (or VI) for subdwarfs, and class D (or VII) for white dwarfs.
3 days ago · Solar luminosity is the total power output of the Sun radiated to the space while solar irradiance is the total power per unit area at a distance of 1AU 1AU. SI unit of solar luminosity is Watt, while that of solar irradiance is Watt per square meter.
2 days ago · Nova, any of a class of exploding stars whose luminosity temporarily increases from several thousand to as much as 100,000 times its normal level. A nova reaches maximum luminosity within hours after its outburst and may shine intensely for several days or occasionally for a few weeks, after which.
1 day ago · The faintest stars visible to the unaided eye are sixth magnitude, while the brightest in the night sky, Sirius, is of magnitude −1.46. To standardize the magnitude scale, astronomers chose Vega and several similar stars and averaged their brightness to represent magnitude zero at all wavelengths.
3 days ago · Luminosity: 316.2 L; Radius: 4.35 solar radius; Surface temperature: 12,460 K; Distance from the Earth: 79.3 light-years; Rotation period: 16 hours; Regulus star system. Although Regulus appears to be a single star, it’s actually a system of four stars that are organized into two pairs.
1 day ago · The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
