<Tr> <Td> 10 </Td> <Td> 7022236518261814520 ♠ 2.5 × 10 ly </Td> <Td> The Andromeda Galaxy is approximately 2.5 million light - years away . </Td> </Tr> <Tr> <Td> 7022283821914177424 ♠ 3 × 10 ly </Td> <Td> The Triangulum Galaxy (M33), at about 3 million light - years away, is the most distant object visible to the naked eye . </Td> </Tr> <Tr> <Td> 7023558183097882267 ♠ 59 × 10 ly </Td> <Td> The nearest large galaxy cluster, the Virgo Cluster, is about 59 million light - years away . </Td> </Tr> <Tr> <Td> 7008150000000000000 ♠ 150 × 10--7024236518261814520 ♠ 250 × 10 ly </Td> <Td> The Great Attractor lies at a distance of somewhere between 150 and 250 million light - years (the latter being the most recent estimate). </Td> </Tr>

One light year is equal to how many seconds