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• The total amount of radiant energy from the Sun that falls on a surface in a given amount of time.

  NASA - Cite This Source - This Definition
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  Cite Definition for Total Solar Irradiance

  American Psychological Association (APA)

  Total Solar Irradiance. (n.d.). NASA Helioviewer.org Visual Glossary. Retrieved June 10, 2023, from website: http://www.expertglossary.com/definition/total-solar-irradiance.

  Chicago Manual of Style (CMS)

  Total Solar Irradiance. helioviewer.nascom.nasa.gov. NASA Helioviewer.org Visual Glossary. NASA. http://www.expertglossary.com/definition/total-solar-irradiance (accessed: June 10, 2023).

  Modern Language Association (MLA)

  "Total Solar Irradiance." NASA Helioviewer.org Visual Glossary. NASA. 10 June. 2023 http://www.expertglossary.com/definition/total-solar-irradiance.

• Browse Related Terms: Convective Zone, Granules, Irradiation, Solar Spectral Irradiance (SSI), Sunspot Cycle, Total Solar Irradiance

All > Science > Astronomy

• Area of the Sun’s atmosphere with temperatures between those of the chromosphere and the corona, 20,000 and 1,000,000 K (35,000 and 1,800,000°F), respectively.

  NASA - Cite This Source - This Definition
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  Cite Definition for Transition Region

  American Psychological Association (APA)

  Transition Region. (n.d.). NASA Helioviewer.org Visual Glossary. Retrieved June 10, 2023, from website: http://www.expertglossary.com/definition/transition-region.

  Chicago Manual of Style (CMS)

  Transition Region. helioviewer.nascom.nasa.gov. NASA Helioviewer.org Visual Glossary. NASA. http://www.expertglossary.com/definition/transition-region (accessed: June 10, 2023).

  Modern Language Association (MLA)

  "Transition Region." NASA Helioviewer.org Visual Glossary. NASA. 10 June. 2023 http://www.expertglossary.com/definition/transition-region.

• Browse Related Terms: Chromosphere, Corona, Coronagraph, Coronal Hole, Filament, Photosphere, Prominence, Prominences, Solar Eclipse, Transition Region

All > Science > Astronomy > Astrophysics

• Supernova formed from the explosion of an old, compact star (white dwarf). Used as standard candles as they have uniform intrinsic brightness.

  Lawrence Berkeley National Laboratory's Physics Division - Cite This Source - This Definition
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  Cite Definition for Type Ia Supernova

  American Psychological Association (APA)

  Type Ia Supernova. (n.d.). The Universe Adventure Glossary. Retrieved June 10, 2023, from website: http://www.expertglossary.com/definition/type-ia-supernova.

  Chicago Manual of Style (CMS)

  Type Ia Supernova. pdgusers.lbl.gov. The Universe Adventure Glossary. Lawrence Berkeley National Laboratory's Physics Division. http://www.expertglossary.com/definition/type-ia-supernova (accessed: June 10, 2023).

  Modern Language Association (MLA)

  "Type Ia Supernova." The Universe Adventure Glossary. Lawrence Berkeley National Laboratory's Physics Division. 10 June. 2023 http://www.expertglossary.com/definition/type-ia-supernova.

• Browse Related Terms: Angular Size, Apparent luminosities, Constant of Proportionality, Dark Matter, Flux, Heavenly Bodies, Intrinsic Luminosity, Inverse Square, Luminosity, Main Sequence Star, Observed Brightness, Parallax, Parsec, Relative Brightness, Standard Candle, Type Ia Supernova, Variable Stars