Concept
Hertzsprung–Russell Diagram
Astronomy's most important chart.
A plot of stars' luminosities against their temperatures or spectral types, revealing the main sequence, giants, supergiants and white dwarfs.
Overview
A plot of stars' luminosities against their temperatures or spectral types, revealing the main sequence, giants, supergiants and white dwarfs.
See also
The Big Bang
How everything began, 13.8 billion years ago.
Black Holes
Regions where gravity stops light itself.
Dark Matter
The invisible mass holding galaxies together.
Dark Energy
The mysterious force accelerating the universe.
Light-Year & Astronomical Distances
Measuring the unimaginable.
Gravity
The force that shapes the universe.