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Reisman said he left NASA because he wanted to have an impact on the future of space flight
Parsec conversion table
relative distances in space
1 attoparsec = 3.086 cm
1 femtoparsec = 30.86 m
1 ppc = 30.86 km // Oppegård to Oslo: roughly 0.7 ppc
1 npc = 30856 km // circumference of earth: 1.30 npc, GEO: 1.16 npc
1 µpc = 30.86 Gm // sun to mercury: 2 µpc, sun to earth: 4.8
µpc
1 mpc = 30.86 Tm // sun to pluto: 0.19 mpc
1 pc = 30.86 Pm // earth to alpha centauri: 1.3 pc
1 kpc = 30.86 Em // earth to center of milky way: 8 kpc
1 Mpc = 30.86 Zm // earth to Andromeda galaxy: 0.8 Mpc
earth to Virgo cluster: 18 Mpc
1 Gpc = 30.86 Ym // diameter of known universe: 28 Gpc
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