4 ms·
See also 1490 Ch'ing-yang event: https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event
by jetzzz 7y ago
See also 1490 Ch'ing-yang event:
https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event