Scale Comparison
Aldebaran is a red-giant-branch star about 45 times the Sun’s diameter.
Aldebaran’s expanded outer layers are cooler than the Sun’s surface. It appears among the Hyades from Earth but lies much closer and is not a member of that cluster.
Objects
The Sun is the star at the center of the Solar System and the source of almost all the energy reaching its planets. It fuses about 600 million metric tons of hydrogen each second, and energy released in the core takes on the order of 100,000 years to work its way out to the visible surface.
Aldebaran is a red giant branch star in Taurus with a cool orange surface and a diameter about 45 times the Sun’s. It lies in front of the Hyades cluster by chance, so it appears to sit among the bull’s-head stars without actually belonging to that group.
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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 explain selected parts of that range, while focused views filter the objects by subject.