<Table> <Tr> <Th> </Th> <Th_colspan="2"> Moon </Th> <Th_colspan="2"> Sun </Th> </Tr> <Tr> <Th> At perigee (nearest) </Th> <Th> At apogee (farthest) </Th> <Th> At perihelion (nearest) </Th> <Th> At aphelion (farthest) </Th> </Tr> <Tr> <Th> Mean radius </Th> <Td_colspan="2"> 1,737.10 km (1,079.38 mi) </Td> <Td_colspan="2"> 696,000 km (432,000 mi) </Td> </Tr> <Tr> <Th> Distance </Th> <Td> 363,104 km (225,622 mi) </Td> <Td> 405,696 km (252,088 mi) </Td> <Td> 147,098,070 km (91,402,500 mi) </Td> <Td> 152,097,700 km (94,509,100 mi) </Td> </Tr> <Tr> <Th> Angular diameter </Th> <Td> 33' 30" (0.5583 °) </Td> <Td> 29' 26" (0.4905 °) </Td> <Td> 32' 42" (0.5450 °) </Td> <Td> 31' 36" (0.5267 °) </Td> </Tr> <Tr> <Th> Apparent size to scale </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> Order by decreasing apparent size </Th> <Td> 1st </Td> <Td> 4th </Td> <Td> 2nd </Td> <Td> 3rd </Td> </Tr> </Table> <Tr> <Th> </Th> <Th_colspan="2"> Moon </Th> <Th_colspan="2"> Sun </Th> </Tr> <Tr> <Th> At perigee (nearest) </Th> <Th> At apogee (farthest) </Th> <Th> At perihelion (nearest) </Th> <Th> At aphelion (farthest) </Th> </Tr> <Tr> <Th> Mean radius </Th> <Td_colspan="2"> 1,737.10 km (1,079.38 mi) </Td> <Td_colspan="2"> 696,000 km (432,000 mi) </Td> </Tr>

Why must there be a new moon for a solar eclipse to occur