sizes and scales in astronomy. 1mm 1cm earth: radius 6,400km equivalent to 0.5mm jupiter 70,000km
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Sizes and scales in Astronomy
1mm
1cm
Earth: radius 6,400km equivalent to 0.5mm
Jupiter 70,000km
Sun 700,000km
Earth 6,400km
Jupiter 70,000km
Distance from Earth to Sun is 149,600,000km = 1AU(12m)
SunEarthJupiter
1 AU4 AU
Heliopause – 100 AU (1.2km)
Pluto’s Orbit – 40 AU
6km
100km
1500km
3000km
Solar System Proxima Centauri <1.3 pc = 268,000AU>
20,000km
Stars Nearer than 5 pc: 70
Solar System
200 AU equivalent to 1mm (Earth is size of atom);1 pc equivalent to 1m
Rescale:
Stars within 5 pc
Milky way: 300,000pc across (300km)
Milky Way
30 galaxies, 10,000km across
Rescale:
Milky Way
300,000pc equivalent to 10cm- Solar system smaller than size of atom- Earth 1,000 times smaller than the smallest sub-atomic particle known
Local GroupLocal Supercluster (Virgo, 2000 galaxies)
Observable Universe: 96,000,000,000pc across
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