Stellar · Stars
The Sun
1.393 million kmThe star containing almost all the solar system’s mass and powering nearly every surface ecosystem.
Stellar ↔ Stellar
How many Suns fit across VY Canis Majoris?
Compare the Sun with one of the largest known evolved stars while keeping its uncertain, diffuse boundary explicit.
Linear ratio1,422×
Using the stated linear measurements, VY Canis Majoris is 1,422× The Sun.
Stellar · Stars
VY Canis Majoris
≈1.98 billion kmAn extreme red hypergiant surrounded by material it has expelled into space.
The answer
A ratio, an analogy and the definitions behind both.
Using the stated linear measurements, VY Canis Majoris is 1,422× The Sun.
About 1,422× The Sun linear spans fit across the selected measurement of VY Canis Majoris.
mean diameter versus estimated stellar diameter
The metre values can be divided as linear spans, but the two entries do not describe identical kinds of boundary.
The Sun is measured; vY Canis Majoris is variable.
Representative, variable and model-dependent values are useful for perspective only when their status remains visible.
Measurement ledger
What exactly was divided?
| Landmark | Value | Measurement | Certainty | Source |
|---|---|---|---|---|
| The Sun | 1.393 million km | mean diameter | Measured | NASA Science ↗ |
| VY Canis Majoris | ≈1.98 billion km | estimated stellar diameter | Variable | NASA Science ↗ |