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  2. Hertzsprung–Russell diagram - Wikipedia

    en.wikipedia.org/wiki/HertzsprungRussell_diagram

    This type of diagram could be called temperature-luminosity diagram, but this term is hardly ever used; when the distinction is made, this form is called the theoretical Hertzsprung–Russell diagram instead. A peculiar characteristic of this form of the H–R diagram is that the temperatures are plotted from high temperature to low temperature ...

  3. Hertzsprung gap - Wikipedia

    en.wikipedia.org/wiki/Hertzsprung_gap

    This diagram is a plot of effective temperature versus luminosity for a population of stars. The gap is named after Ejnar Hertzsprung, who first noticed the absence of stars in the region of the Hertzsprung–Russell diagram [1] between A5 and G0 spectral type and between +1 and −3 absolute magnitudes.

  4. Main sequence turnoff - Wikipedia

    en.wikipedia.org/wiki/Main_sequence_turnoff

    The turnoff point for a star refers to the point on the Hertzsprung–Russell diagram where it leaves the main sequence after its main fuel is exhausted – the main sequence turnoff. By plotting the turnoff points of individual stars in a star cluster one can estimate the cluster's age.

  5. Blue loop - Wikipedia

    en.wikipedia.org/wiki/Blue_loop

    The name derives from the shape of the evolutionary track on a Hertzsprung–Russell diagram which forms a loop towards the blue (i.e. hotter) side of the diagram, to a place called the blue giant branch. [1] Blue loops can occur for red supergiants, red-giant branch stars, or asymptotic giant branch stars. Some stars may undergo more than one ...

  6. Red clump - Wikipedia

    en.wikipedia.org/wiki/Red_clump

    The red clump is a clustering of red giants in the Hertzsprung–Russell diagram at around 5,000 K and absolute magnitude (M V) +0.5, slightly hotter than most red-giant-branch stars of the same luminosity. It is visible as a denser region of the red-giant branch or a bulge towards hotter temperatures.

  7. Horizontal branch - Wikipedia

    en.wikipedia.org/wiki/Horizontal_branch

    Since color index is the horizontal coordinate in a Hertzsprung–Russell diagram, the different types of star appear in different parts of the CMD despite their common energy source. In effect, the red clump represents one extreme of horizontal-branch morphology: all the stars are at the red end of the horizontal branch, and may be difficult ...

  8. 5 predictions for the 2025 MLB season: The Yankees will be ...

    www.aol.com/sports/5-predictions-2025-mlb-season...

    2. The Blue Jays will trade Vladimir Guerrero Jr. and/or Bo Bichette. At one point, the Blue Jays were a young, hungry team looking like they were next up to dominate the American League.

  9. White dwarf cooling anomaly - Wikipedia

    en.wikipedia.org/wiki/White_dwarf_cooling_anomaly

    On the Hertzsprung–Russell diagram – a scatter plot of stellar effective temperature versus luminosity – this cooling can be viewed as following a sequence leading down and to the right over time. That is, the temperature and luminosity of the white dwarf will diminish over time as energy is lost.