Milky Way Galaxy

Milky Way Galaxy
The Milky Way is the galaxy that contains our Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye. Wikipedia
Radius: 52,850 light years
Stars: 25,000 crores ± 15,000 crores
Sun's Galactic rotation period: 240 Myr
Sun's distance to Galactic Center: 26.4 ± 1.0 kly (8.09 ± 0.31 kpc)
Escape velocity at Sun's position: 550 km/s
Spiral pattern rotation period: 220–360 Myr

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