Scale insight
Scale Comparison
Betelgeuse vs Rigel, to scale
Both stars anchor Orion, but they do not represent the same kind of stellar scale. Put together on one diameter axis, Betelgeuse and Rigel show that even two famous supergiants in the same constellation can live in very different size regimes.
Shared physical scale
585million km
Betelgeuse and Rigel are culturally paired already. Orion makes them feel like matching cornerstones of one pattern, but physical scale shows that they are not symmetrical representatives of a single supergiant template.
Rigel is enormous by the standards of ordinary stars, yet Betelgeuse still pushes far beyond it in visible extent. The constellation map hides a much wider stellar spread than the eye suggests.
Objects
Open each object in context
Rigel is the blue-white supergiant that marks Orion’s foot and dominates the constellation’s lower half. Although it looks solitary to the eye, it is actually part of a multiple-star system built around a spectacularly luminous hot primary star.
Visual creditscaleofspace.org / CC BY-NC 4.0
Betelgeuse is a red supergiant nearing the end of its stellar life. Its dramatic dimming in 2019 and 2020 turned out to be caused by a dusty veil ejected from the star, giving astronomers a rare direct look at how giant stars shed material into space.
Visual creditscaleofspace.org / CC BY-NC 4.0
Continue reading
Between the smallest and the largest, perspective is everything.
About
Scale of Space is a scroll-based journey through the universe, placing objects on a single logarithmic scale so you can compare size across an unbroken range.
Guides turn parts of that scale into curated essays, while focused views let you explore the same range through specific groups of objects.